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/jest.config.js

@@ -0,0 +1,15 @@
+module.exports = {
+    preset: 'ts-jest',
+    testEnvironment: 'node',
+    roots: ['<rootDir>/nodes'],
+    transform: {
+        '^.+\\.tsx?$': 'ts-jest'
+    },
+    testRegex: '(/__tests__/.*|(\\.|/)(test|spec))\\.tsx?$',
+    moduleFileExtensions: ['ts', 'tsx', 'js', 'jsx', 'json', 'node'],
+    verbose: true,
+    testPathIgnorePatterns: ['/node_modules/', '/dist/'],
+    moduleNameMapper: {
+        '^../../../src/(.*)$': '<rootDir>/src/$1'
+    }
+}