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/tests/test_config.py

@@ -28,7 +28,6 @@ def test_load_system_config(tmp_path, monkeypatch):
 
     assert result['api_url'] == 'https://test.com/api/v1'
     assert result['api_token'] == 'test_token'
-    assert result['owner'] == 'test_owner'
     assert result['mode'] == 'company'  # No repo specified
     assert result['repo'] is None