Add more contributions guides

[ildyria]

Summary by CodeRabbit

• New Features

  • Added infinite scroll threshold settings for galleries to customize preloading behavior.
  • Expanded renamer system with new transformation modes (TRIM, LOWER, UPPER, UCWORDS, UCFIRST) and per-resource applicability controls.
  • Updated photo-album relationship structure for enhanced flexibility.

• Documentation

  • Added quick Docker-based installation instructions to README.
  • Introduced AI/Claude contribution guidelines for developers.
  • Updated API and database schema documentation.

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📝 Walkthrough

Walkthrough

This PR documents several system enhancements: AI-assisted contribution guidelines, Docker-based quick-start instructions, Photo-Album many-to-many relationships replacing single ownership, expanded Renamer modes and rule applicability flags, new infinite scroll pagination configuration, and updated localization file references. Primarily documentation with data model and public API declaration updates reflected in reference docs.

Changes

Cohort / File(s)	Summary
Contribution Guidelines README.md, docs/Contribute.md, docs/README.md	Added AI/Claude contribution guidelines with Specification-Driven Development (SDD) workflow and two-PR submission pattern. Added Docker quick-start block. Updated navigation links and timestamps across contribution documentation.
How-To Guides docs/specs/2-how-to/configure-pagination.md, docs/specs/2-how-to/sql-timeout-logging.md, docs/specs/2-how-to/translating-lychee.md, docs/specs/2-how-to/using-renamer.md	Documented new infinite scroll threshold settings; updated SQL timeout severity levels and location references; updated test command references; expanded Renamer modes (TRIM, LOWER, UPPER, UCWORDS, UCFIRST) with new rule applicability flags and revised code examples.
Conceptual & Reference Docs docs/specs/1-concepts/README.md, docs/specs/3-reference/api-design.md, docs/specs/3-reference/database-schema.md, docs/specs/3-reference/localization.md, docs/specs/3-reference/renamer-system.md	Updated Album relationship documentation (now includes both AlbumSizeStatistics and Statistics); documented Photo model pivot table renames and many-to-many Album relationship; expanded RenamerModeType enum and updated RenamerRule public declarations (replaced name with rule, removed timestamps, added is_photo_rule and is_album_rule); reconciled localization file index.

Estimated code review effort

🎯 3 (Moderate) | ⏱️ ~25 minutes

Poem

🐰 Docs renewed with springtime cheer,
Many-to-many albums appear!
Renamer modes bloom, pagination flows,
AI wisdom and Docker—how the garden grows! 🌱✨

🚥 Pre-merge checks | ✅ 1

✅ Passed checks (1 passed)

Check name	Status	Explanation
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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Actionable comments posted: 3

🧹 Nitpick comments (1)

docs/specs/2-how-to/sql-timeout-logging.md (1)

137-140: Add required “Last updated” footer.

Per documentation guidelines, append an HR and a “Last updated” line at the bottom of this Markdown file.

✅ Proposed footer

@@
 - Traditional PHP-FPM may not trigger all timeout handlers consistently
+
+---
+*Last updated: January 21, 2026*