refactor: remove tool metadata and registrar implementations

- Deleted tool-metadata.ts and tool-metadata.test.ts files as part of the refactor.
- Removed tool-registrar.ts and tool-registrar.test.ts files to streamline tool registration process.
- Eliminated tool-registry.ts and tool-validator.ts files to simplify tool validation logic.
- Updated tools-manifest.json to remove unnecessary whitespace and ensure consistent formatting.
- Added tsconfig.test.json for better test configuration management.
- Updated tsconfig.json to enable downlevel iteration for improved compatibility.
- Updated yarn.lock to include new dependencies and ensure consistent package versions.

Author: Coderrob