feat: add JSONPathExtractor tool (#5052)

* 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.

---------

Co-authored-by: Henry Heng <henryheng@flowiseai.com>

packages/components/tsconfig.json

@@ -17,5 +17,5 @@
         "module": "commonjs"
     },
     "include": ["src", "nodes", "credentials"],
-    "exclude": ["gulpfile.ts", "node_modules", "dist"]
+    "exclude": ["gulpfile.ts", "node_modules", "dist", "**/*.test.ts", "**/*.test.js", "**/*.spec.ts", "**/*.spec.js"]
 }