feat: add Prettier for code formatting (closes #27)

- Add Prettier (v3) with standard config (.prettierrc.json)
- Add .prettierignore for build artifacts and lock files
- Integrate eslint-config-prettier to disable conflicting ESLint rules
- Add `format` and `format:check` npm scripts
- Format all existing source files with Prettier

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: Ai-chan-0411

.github/ISSUE_TEMPLATE/bug-report.md

@@ -1,10 +1,9 @@
 ---
 name: Bug Report
 about: Reporting bugs in existing code
-title: ''
+title: ""
 labels: bug, good first issue
-assignees: ''
-
+assignees: ""
 ---
 
 ## The Problem

.github/ISSUE_TEMPLATE/documentation.md

@@ -1,10 +1,9 @@
 ---
 name: Documentation
 about: Report issues or additions to Documentation
-title: ''
+title: ""
 labels: documentation, good first issue
-assignees: ''
-
+assignees: ""
 ---
 
 ## Description of what to add

.github/ISSUE_TEMPLATE/feature-change-request.md

@@ -1,10 +1,9 @@
 ---
 name: Feature-Change Request
 about: Suggest a change in an existing feature
-title: ''
+title: ""
 labels: change, good first issue
-assignees: ''
-
+assignees: ""
 ---
 
 ## What needs to change

.github/ISSUE_TEMPLATE/feature-request.md

@@ -1,10 +1,9 @@
 ---
 name: Feature Request
 about: Suggest a new feature for this project
-title: ''
+title: ""
 labels: feature, good first issue
-assignees: ''
-
+assignees: ""
 ---
 
 ## Description of the feature

.github/ISSUE_TEMPLATE/refactoring.md

@@ -1,10 +1,9 @@
 ---
 name: Refactoring Request
 about: Suggest refactoring or code quality improvements
-title: ''
+title: ""
 labels: refactoring, good first issue
-assignees: ''
-
+assignees: ""
 ---
 
 ## Area to Refactor
@@ -20,9 +19,7 @@ assignees: ''
 
 - describe the refactoring approach in bullet points
 
-
 > [!NOTE]
 > **CONTRIBUTIONS ARE WELCOME!**
 > If you want to get this issue assigned to you, just comment `assign this issue to me`.
 > You will be assigned to the issue instantly via GitHub-actions bot.
-

.prettierignore

@@ -0,0 +1,7 @@
+.next
+node_modules
+out
+dist
+build
+pnpm-lock.yaml
+package-lock.json

.prettierrc.json

@@ -0,0 +1,12 @@
+{
+  "semi": true,
+  "trailingComma": "es5",
+  "singleQuote": false,
+  "printWidth": 80,
+  "tabWidth": 2,
+  "useTabs": false,
+  "bracketSpacing": true,
+  "arrowParens": "always",
+  "endOfLine": "lf",
+  "jsxSingleQuote": false
+}

CONTRIBUTING.md

@@ -37,16 +37,19 @@ Thank you for your interest in contributing to DevImpact! This guide will help y
 ### Installation
 
 1. Install dependencies:
+
    ```bash
    pnpm install
    ```
 
 2. Create a `.env` file in the project root (see `.env.example`):
+
    ```
    GITHUB_TOKEN=your_github_token_here
    ```
 
 3. Start the development server:
+
    ```bash
    pnpm dev
    ```
@@ -79,25 +82,29 @@ DevImpact/
 ## Making Changes
 
 1. **Sync your fork** with the latest upstream changes:
+
    ```bash
    git fetch upstream
    git checkout main
    git merge upstream/main
    ```
 
 2. **Create a feature branch** from `main`:
+
    ```bash
    git checkout -b feat/your-feature-name
    ```
 
 3. **Make your changes** and test them locally.
 
 4. **Run the linter** before committing:
+
    ```bash
    pnpm lint
    ```
 
 5. **Commit your changes** with a clear message:
+
    ```bash
    git commit -m "feat: add your feature description"
    ```

README.md

@@ -1,4 +1,5 @@
 # 🚀 DevImpact
+
 ![License](https://img.shields.io/github/license/o2sa/devimpact)
 ![Stars](https://img.shields.io/github/stars/o2sa/devimpact)
 ![Forks](https://img.shields.io/github/forks/o2sa/devimpact)
@@ -11,14 +12,13 @@
 ![Node.js](https://img.shields.io/badge/Node.js-green?logo=node.js)
 ![GraphQL](https://img.shields.io/badge/GraphQL-pink?logo=graphql)
 
-
 **DevImpact** is an open-source platform that compares software developers based on their real impact in the open-source ecosystem — not just raw numbers.
 
 It evaluates developers using a smart scoring system that considers:
 
-* Repository quality 📦
-* Pull request impact 🔀
-* Community contributions 💬
+- Repository quality 📦
+- Pull request impact 🔀
+- Community contributions 💬
 
 ---
 
@@ -28,9 +28,9 @@ Traditional metrics (followers, stars, commit counts) are often misleading.
 
 DevImpact focuses on:
 
-* ✅ Quality over quantity
-* ✅ Real contributions to valuable projects
-* ✅ Fair comparison between developers
+- ✅ Quality over quantity
+- ✅ Real contributions to valuable projects
+- ✅ Fair comparison between developers
 
 ---
 
@@ -44,9 +44,9 @@ Measures the quality and impact of repositories owned by the user.
 
 Factors include:
 
-* Stars ⭐
-* Forks 🍴
-* Watchers
+- Stars ⭐
+- Forks 🍴
+- Watchers
 
 ---
 
@@ -59,10 +59,10 @@ Measures contributions to **other developers' repositories**.
 
 Factors include:
 
-* Target repository quality
-* PR size (additions/deletions)
-* Repository popularity
-* Contribution diversity
+- Target repository quality
+- PR size (additions/deletions)
+- Repository popularity
+- Contribution diversity
 
 ---
 
@@ -72,8 +72,8 @@ Measures community engagement.
 
 Includes:
 
-* Issues opened in external repositories
-* Discussions participation
+- Issues opened in external repositories
+- Discussions participation
 
 ⚠️ Does NOT include commits or PRs (to avoid duplication)
 
@@ -96,44 +96,41 @@ Final Score =
 
 ## ⚖️ Key Design Principles
 
-* ❌ No self-inflation (own PRs excluded)
-* 📉 Diminishing returns to prevent spam
-* 🎯 External impact is prioritized
-* ⚖️ Balanced scoring between builders and contributors
+- ❌ No self-inflation (own PRs excluded)
+- 📉 Diminishing returns to prevent spam
+- 🎯 External impact is prioritized
+- ⚖️ Balanced scoring between builders and contributors
 
 ---
 
 ## 🖥️ Features
 
-* 🔍 Compare two GitHub users side-by-side
-* 📊 Visual score breakdown (charts & insights)
-* 🧠 Smart ranking system
-* 🌍 Localization support (EN / AR)
-* ⚡ Fast API powered by GitHub GraphQL
-* 🧩 Extensible scoring system
+- 🔍 Compare two GitHub users side-by-side
+- 📊 Visual score breakdown (charts & insights)
+- 🧠 Smart ranking system
+- 🌍 Localization support (EN / AR)
+- ⚡ Fast API powered by GitHub GraphQL
+- 🧩 Extensible scoring system
 
 ---
 
 ## 🛠️ Tech Stack
 
 ### Frontend
 
-* Next.js (App Router)
-* TypeScript
-* Tailwind CSS
-* Recharts
+- Next.js (App Router)
+- TypeScript
+- Tailwind CSS
+- Recharts
 
 ### API
 
-* Node.js + Express
-* GitHub GraphQL API
-* Octokit
+- Node.js + Express
+- GitHub GraphQL API
+- Octokit
 
 ---
 
-
-
-
 ## 🚀 Getting Started
 
 ### 1. Clone the repo
@@ -173,14 +170,13 @@ pnpm run dev
 
 ## 🌍 Localization
 
-* Supported languages: English 🇺🇸, Arabic 🇸🇦
-* Automatically detects user language
-* Allows manual switching
-* Easy to add new languages via `/locales`
+- Supported languages: English 🇺🇸, Arabic 🇸🇦
+- Automatically detects user language
+- Allows manual switching
+- Easy to add new languages via `/locales`
 
 ---
 
-
 ## 🤝 Contributing
 
 Contributions are welcome!
@@ -196,22 +192,21 @@ Contributions are welcome!
 
 ### Contribution ideas:
 
-* Improve scoring algorithm
-* Add new metrics
-* Enhance UI/UX
-* Add new languages 🌍
+- Improve scoring algorithm
+- Add new metrics
+- Enhance UI/UX
+- Add new languages 🌍
 
 ---
 
 ## ⚠️ Limitations
 
-* GitHub API rate limits
-* Some private contributions are not accessible
-* Scoring system is heuristic (not perfect)
+- GitHub API rate limits
+- Some private contributions are not accessible
+- Scoring system is heuristic (not perfect)
 
 ---
 
-
 ## 💡 Inspiration
 
 DevImpact was created to answer a simple question:
@@ -224,7 +219,6 @@ DevImpact was created to answer a simple question:
 
 If you like this project:
 
-* ⭐ Star the repo
-* 🐛 Report issues
-* 💡 Suggest features
-
+- ⭐ Star the repo
+- 🐛 Report issues
+- 💡 Suggest features