feat: add Rust language to seed list

[Sparticle62ops]

I really want Rust in code typer 🙏🙏

Adds Rust to the supported languages list so the seeder can fetch and populate Rust snippets from GitHub. This enables Rust in the language picker and game.

Summary by CodeRabbit

• New Features
  • Added Rust language support, including .rs file recognition, syntax highlighting, and improved parsing of Rust syntax.
• Bug Fixes
  • Duplicate files encountered during setup are now skipped so processing can continue.

[coderabbitai]

Walkthrough

Changes

Rust language support

Layer / File(s)	Summary
Rust runtime and language wiring prisma/seed/languages.ts, package.json, next.config.ts, lib/snippets/parsing/parser-factory.ts	Adds Rust language metadata, the tree-sitter-rust dependency, server external configuration, and parser-factory dispatch.
Rust-specific range extraction src/features/snippets/logic/parsing/snippet-parser.server.ts	Adds dedicated extraction for Rust comments, lifetimes, loop labels, and string or character literals.

Seed duplicate handling

Layer / File(s)	Summary
Duplicate file insertion handling prisma/seed/files.ts	Skips duplicate file records with a warning, bypasses file-version creation when insertion is skipped, and rethrows other database errors.

Estimated code review effort: 3 (Moderate) | ~20 minutes

Possibly related PRs

• mattiacerutti/code-typer#11: Adds Tree-sitter support for another language through similar metadata, dependency, external-package, and parser-factory updates.

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title clearly identifies the main change: adding Rust to the supported language seed list.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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[mattiacerutti]

Thanks for the PR!

[coderabbitai]

Actionable comments posted: 1

🧹 Nitpick comments (1)

src/features/snippets/logic/parsing/snippet-parser.server.ts (1)

23-42: 📐 Maintainability & Code Quality | 🔵 Trivial | ⚡ Quick win

Add regression tests for the Rust disabled ranges.

Cover line comments, block comments, lifetimes, loop labels, normal strings, raw strings, byte-prefixed literals, character literals, escaped delimiters, and empty literals. Include exact startIndex/endIndex expectations with delimiter exclusion and the same endpoint convention used by getRandomSnippets().

🤖 Prompt for AI Agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

In `@src/features/snippets/logic/parsing/snippet-parser.server.ts` around lines 23
- 42, Add regression tests for the Rust-specific range handling in the parser
around the existing getRandomSnippets() behavior. Cover line_comment,
block_comment, lifetime, loop_label, string_literal, raw_string_literal,
byte-prefixed literals, char_literal, escaped delimiters, and empty literals,
asserting exact startIndex/endIndex values with delimiters excluded and matching
getRandomSnippets()’s endpoint convention.

🤖 Prompt for all review comments with AI agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

Inline comments:
In `@prisma/seed/files.ts`:
- Around line 75-81: Update the file seeding flow around fileVersion.create and
the final summary log to track successfully seeded files separately from
files.length. Initialize a counter before processing, increment it only after
fileVersion.create succeeds, and report that counter so duplicate files
returning null are excluded.

---

Nitpick comments:
In `@src/features/snippets/logic/parsing/snippet-parser.server.ts`:
- Around line 23-42: Add regression tests for the Rust-specific range handling
in the parser around the existing getRandomSnippets() behavior. Cover
line_comment, block_comment, lifetime, loop_label, string_literal,
raw_string_literal, byte-prefixed literals, char_literal, escaped delimiters,
and empty literals, asserting exact startIndex/endIndex values with delimiters
excluded and matching getRandomSnippets()’s endpoint convention.

🪄 Autofix (Beta)

Fix all unresolved CodeRabbit comments on this PR:

• Push a commit to this branch (recommended)
• Create a new PR with the fixes

---

ℹ️ Review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro Plus

Run ID: ea0112f2-f2bd-491d-9f64-93ce898cabdc

📥 Commits

Reviewing files that changed from the base of the PR and between 473e095 and 262a02c.

⛔ Files ignored due to path filters (1)

• package-lock.json is excluded by !**/package-lock.json

📒 Files selected for processing (5)

• lib/snippets/parsing/parser-factory.ts
• next.config.ts
• package.json
• prisma/seed/files.ts
• src/features/snippets/logic/parsing/snippet-parser.server.ts

[coderabbitai]

🎯 Functional Correctness | 🟡 Minor | ⚡ Quick win

Report the number of files that were actually seeded.

When a duplicate returns null, this branch skips the file. The final log at Line 92 still reports files.length, so it counts skipped files as seeded files. Track a counter and increment it only after fileVersion.create succeeds.

Proposed fix

+  let seededCount = 0;
   for (const file of files) {
     ...
     await prisma.fileVersion.create({
       ...
     });
+    seededCount += 1;
   }

-  console.log(`Seeded ${files.length} files for language: ${language.name}`);
+  console.log(`Seeded ${seededCount} files for language: ${language.name}`);

🤖 Prompt for AI Agents

Verify each finding against current code. Fix only still-valid issues, skip the
rest with a brief reason, keep changes minimal, and validate.

In `@prisma/seed/files.ts` around lines 75 - 81, Update the file seeding flow
around fileVersion.create and the final summary log to track successfully seeded
files separately from files.length. Initialize a counter before processing,
increment it only after fileVersion.create succeeds, and report that counter so
duplicate files returning null are excluded.

[Sparticle62ops]

Thanks for adding it :)