perf: check in neural patterns to avoid rebuild on every publish

- Add embeddedPatterns.ts to version control (544KB file)
- Add check-patterns.js script to detect when rebuild is needed
- Modify build scripts to only rebuild patterns when changed
- This avoids memory-intensive pattern embedding on every npm publish
- Patterns rarely change, so this significantly speeds up releases

package.json

@@ -58,8 +58,10 @@
     "node": ">=18.0.0"
   },
   "scripts": {
-    "build": "npm run build:patterns && tsc",
+    "build": "npm run build:patterns:if-needed && tsc",
     "build:patterns": "tsx scripts/buildEmbeddedPatterns.ts",
+    "build:patterns:if-needed": "node scripts/check-patterns.js || npm run build:patterns",
+    "build:patterns:force": "npm run build:patterns",
     "prepare": "npm run build",
     "test": "npm run test:unit",
     "test:watch": "vitest --config tests/configs/vitest.unit.config.ts",