* feat: add JSONPathExtractor tool with lodash-based path extraction
- Implement JSONPathExtractor tool for extracting values from JSON using path notation
- Use lodash.get for robust path extraction supporting edge cases (numeric string keys, array indexing)
- Add configurable error handling with returnNullOnError parameter
- Include comprehensive test suite with 34 tests covering all scenarios
- Support JSON strings, objects, and arrays as input
* fix lint
* Update pnpm-lock.yaml
* fix: exclude test files from TypeScript compilation
Prevents test files from being included in the dist folder which was causing
"jest is not defined" errors during server startup.
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Co-authored-by: Henry Heng <henryheng@flowiseai.com>