docs: add getting-started guidance files for all supported languages

[htnabe]

Overview

Add per-language getting-started guidance files so every currently supported locale has a dedicated guide file under docs/guidance.

Changes

• Added getting-started guidance files for: de, es, fr, hi, ko, zh-cn, zh-tw.
• Used the existing English guide as the baseline content for consistency.
• Set language-specific headings in each new file.

Related Issues

None.

Checklist

• Self-review done (following review.prompt.md)
• Hugo production build passes: cd exampleSite && hugo --gc --minify
• Docs updated if behavior changed
• No unrelated changes included

Notes for Reviewers

This PR focuses on file coverage so each supported language has a guidance document path. Content translation quality can be improved in follow-up PRs if needed.

[Copilot]

Pull request overview

This PR expands the theme’s documentation coverage by adding per-locale “getting started” guide files under docs/guidance/, aligning with the set of supported locales (matching the existing i18n/*.yaml set).

Changes:

• Added new getting-started markdown files for de, es, fr, hi, ko, zh-cn, and zh-tw.
• Kept content aligned with the existing English guide, with locale-specific headings.

Reviewed changes

Copilot reviewed 7 out of 7 changed files in this pull request and generated 11 comments.

Show a summary per file

File	Description
docs/guidance/getting-started.de.md	Adds German-locale getting-started guide file (content currently mirrors English).
docs/guidance/getting-started.es.md	Adds Spanish-locale getting-started guide file (content currently mirrors English).
docs/guidance/getting-started.fr.md	Adds French-locale getting-started guide file (content currently mirrors English).
docs/guidance/getting-started.hi.md	Adds Hindi-locale getting-started guide file (content currently mirrors English).
docs/guidance/getting-started.ko.md	Adds Korean-locale getting-started guide file (content currently mirrors English).
docs/guidance/getting-started.zh-cn.md	Adds Simplified Chinese-locale getting-started guide file (content currently mirrors English).
docs/guidance/getting-started.zh-tw.md	Adds Traditional Chinese-locale getting-started guide file (content currently mirrors English).

[htnabe]

Addressed all Copilot review comments and applied additional docs updates:

• Added a clear English-placeholder note near the top of each new locale guide (de, es, fr, hi, ko, zh-cn, zh-tw).
• Updated locale headings to native labels where requested (हिन्दी, 한국어, 简体中文, 繁體中文).
• Updated README.md guidance index to include all supported locale guide links and added a note about placeholder status.
• Added follow-up guidance to skill docs so future locale-doc additions use native labels and explicit placeholder notes when untranslated.

Please re-review when convenient.

[Copilot]

Pull request overview

Copilot reviewed 10 out of 10 changed files in this pull request and generated no new comments.