fix(gitea): fix 15 failing tests and update documentation

Test Fixes:
- Fix mock_config fixture to use 'owner/repo' format (was separate fields)
- Update test_client_initialization to match current client API
- Add required 'org' argument to get_org_labels, list_repos, aggregate_issues tests
- Update error message assertion in test_no_repo_specified_error
- Fix test_create_issue to mock is_org_repo and label resolution
- Update aggregate_issues tests in test_issues.py with org argument

Documentation Updates:
- Expand tools table from 8 to 36 tools (organized by category)
- Update directory structure to show all 6 tool files
- Remove unused GITEA_OWNER from configuration docs
- Add automatic repository detection documentation
- Add project directory detection strategies
- Update test count from 42 to 64
- Create CHANGELOG.md with full version history

All 64 tests now pass. No production code changes.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

mcp-servers/gitea/.doc-guardian-queue

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+2026-02-03T14:09:25 | mcp-servers | /home/lmiranda/claude-plugins-work/mcp-servers/gitea/tests/test_config.py | docs/COMMANDS-CHEATSHEET.md CLAUDE.md
+2026-02-03T14:09:33 | mcp-servers | /home/lmiranda/claude-plugins-work/mcp-servers/gitea/tests/test_gitea_client.py | docs/COMMANDS-CHEATSHEET.md CLAUDE.md
+2026-02-03T14:10:22 | mcp-servers | /home/lmiranda/claude-plugins-work/mcp-servers/gitea/tests/test_issues.py | docs/COMMANDS-CHEATSHEET.md CLAUDE.md
+2026-02-03T14:17:12 | mcp-servers | /home/lmiranda/claude-plugins-work/mcp-servers/gitea/README.md | docs/COMMANDS-CHEATSHEET.md CLAUDE.md
+2026-02-03T14:18:27 | mcp-servers | /home/lmiranda/claude-plugins-work/mcp-servers/gitea/CHANGELOG.md | docs/COMMANDS-CHEATSHEET.md CLAUDE.md
+2026-02-03T14:18:41 | mcp-servers | /home/lmiranda/claude-plugins-work/mcp-servers/gitea/TESTING.md | docs/COMMANDS-CHEATSHEET.md CLAUDE.md