…ing plan documents

…on to 2.3.1

…g modules

- Removed unnecessary blank lines and adjusted spacing for consistency across JSONIndexBuilder, JSONIndexManager, TypeScriptParsingStrategy, and ProjectManagementService classes.
- Enhanced overall code clarity without altering functionality.

- Changed the import of FileFilter to a more specific path to avoid potential circular import issues.
- This refactor maintains existing functionality while improving code organization.

* feat(index): add shallow index support (INDEX_FILE_SHALLOW); builder method for file list; manager load/build shallow with find_files fallback

* feat(index): default to shallow index; add ShallowIndexManager; deep rebuild tool; remove build_shallow_index tool; watcher+refresh use shallow; fix server context type

* feat(find_files): enforce true glob semantics (* no dir, ** recursive) and unify to shallow index; watcher verified for add/delete

* feat(file_summary): return needs_deep_index hint when deep index not available

…prompts

- delete resource registration in src/code_index_mcp/server.py
- remove ProjectManagementService.get_project_structure; drop unused json import
- remove analyze_code, code_search, set_project prompts; drop unused mcp.types import

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