fix: optimize package size and improve test reliability

Major improvements to build process, package optimization, and test infrastructure:

## Package Size Optimization (3.4MB → 2.2MB)
- Remove source maps from npm package (reduce size by 35%)
- Update package.json files field to exclude *.js.map and *.d.ts.map
- Enhanced .npmignore for better exclusion patterns
- Preserve all browser compatibility and universal shims

## Test Infrastructure Fixes
- Increase test timeouts to 120s for TensorFlow operations
- Improve memory management with garbage collection hooks
- Add proper cleanup between tests to prevent file accumulation
- Configure single-fork test execution to reduce memory usage
- Fix test parameter issues in intelligent verb scoring tests

## Bug Fixes
- Fix lock directory creation in FileSystemStorage
- Remove deprecated node-fetch import from api-integration tests
- Fix addVerb() and db.add() parameter usage throughout test suite
- Ensure proper vector dimensions (384) in all test vectors
- Add directory existence checks before lock file operations

## Build & Development
- Update vitest configuration for better concurrency and reliability
- Add comprehensive test cleanup in setup.ts
- Preserve all browser JavaScript functionality and universal compatibility layer

The package now meets size requirements while maintaining full functionality
for both browser and Node.js environments.

package.json

@@ -94,8 +94,10 @@
     "demo": "npm run build && cd demo/brainy-angular-demo && npm run build && npm run serve",
     "prepare": "npm run build",
     "test": "vitest run",
+    "test:memory": "node --max-old-space-size=4096 --expose-gc ./node_modules/vitest/vitest.mjs run",
     "test:watch": "vitest",
     "test:ui": "vitest --ui",
+    "test:fast": "vitest run --reporter=dot --silent",
     "test:node": "vitest run tests/environment.node.test.ts tests/core.test.ts tests/vector-operations.test.ts tests/tensorflow-patch.test.ts",
     "test:browser": "vitest run tests/environment.browser.test.ts --environment jsdom",
     "test:core": "vitest run tests/core.test.ts",
@@ -166,9 +168,7 @@
   },
   "files": [
     "dist/**/*.js",
-    "dist/**/*.js.map",
     "dist/**/*.d.ts",
-    "dist/**/*.d.ts.map",
     "!dist/framework.js",
     "!dist/framework.js.map",
     "!dist/framework.min.js",