Add comprehensive tests for semantic chunking and search functionality

- Implemented tests for the ChunkConfig and Chunker classes, covering default and custom configurations.
- Added tests for symbol-based chunking, including single and multiple symbols, handling of empty symbols, and preservation of line numbers.
- Developed tests for sliding window chunking, ensuring correct chunking behavior with various content sizes and configurations.
- Created integration tests for semantic search, validating embedding generation, vector storage, and search accuracy across a complex codebase.
- Included performance tests for embedding generation and search operations.
- Established tests for chunking strategies, comparing symbol-based and sliding window approaches.
- Enhanced test coverage for edge cases, including handling of unicode characters and out-of-bounds symbol ranges.

ccw/package.json

@@ -8,7 +8,8 @@
     "ccw": "./bin/ccw.js"
   },
   "scripts": {
-    "test": "node --test",
+    "test": "node --test tests/*.test.js",
+    "test:codexlens": "node --test tests/codex-lens*.test.js",
     "lint": "eslint src/"
   },
   "keywords": [