**feat(search): enhance JSON document search with field-level filtering and prioritization**

- Added support for field-specific and prioritized searches in `brainyData`:
  - Introduced `searchField` option to enable targeted field-level searches.
  - Implemented `priorityFields` option for weighted vectorization and query relevance.
- Developed utilities in `jsonProcessing.ts` and `fieldNameTracking.ts`:
  - `extractTextFromJson` for text extraction with customizable depth and field prioritization.
  - `extractFieldFromJson` to target specific fields in JSON documents.
  - `prepareJsonForVectorization` for optimized JSON vectorization.
- Enhanced management of field names and mappings:
  - Integrated `trackFieldNames` to associate fields with their services.
  - Supported cross-service consistency through `standardFieldMappings`.
- Updated documentation:
  - Added detailed guides for JSON search enhancements and HNSW limitations.
  - Extended usage examples in `README.md` and `json-search-test.js`.
- Verified improvements with comprehensive tests:
  - Created unit and integration tests demonstrating search behavior improvements.
  - Addressed previous TypeScript errors related to search parameters.

**Purpose**: Improve search accuracy and usability when working with complex JSON documents by enabling field-specific searches and enhancing contextual relevance.

src/utils/index.ts

@@ -2,3 +2,5 @@ export * from './distance.js'
 export * from './embedding.js'
 export * from './workerUtils.js'
 export * from './statistics.js'
+export * from './jsonProcessing.js'
+export * from './fieldNameTracking.js'