chore: clean up project for release

Remove development artifacts, test files, and redundant directories:
- Delete debug/reproduction scripts and temporary test files
- Remove brainy-models-package/ (redundant with main models/ directory)
- Remove test-consumer/ development testing directory
- Remove build artifacts (coverage/, test-results.json)
- Remove large brainy-data/ test artifact directory

This cleanup reduces repository size significantly and prepares the project for a clean release.

brainy-models-package/models/universal-sentence-encoder/metadata.json

@@ -1,12 +0,0 @@
-{
-  "name": "universal-sentence-encoder",
-  "version": "1.0.0",
-  "description": "Complete Universal Sentence Encoder model bundled for offline use",
-  "dimensions": 512,
-  "downloadDate": "2025-08-02T21:42:25.604Z",
-  "source": "tensorflow-models/universal-sentence-encoder",
-  "approach": "full-bundle",
-  "modelUrl": "https://storage.googleapis.com/tfjs-models/savedmodel/universal_sentence_encoder",
-  "bundledLocally": true,
-  "reliability": "maximum"
-}