Add build testing and pre-commit hooks

- Add test-build.js script to verify standalone build locally
- Add pre-commit hook with security, build, and test checks
- Copy required-server-files.json to root of standalone for Amplify
- Add husky for automatic pre-commit validation

This ensures we test builds locally before pushing

package.json

@@ -9,7 +9,9 @@
     "lint": "next lint",
     "test": "jest",
     "test:watch": "jest --watch",
-    "security:check": "node scripts/security-check.js"
+    "security:check": "node scripts/security-check.js",
+    "test:build": "node scripts/test-build.js",
+    "prepare": "husky"
   },
   "dependencies": {
     "@types/cheerio": "^0.22.35",
@@ -32,6 +34,7 @@
     "eslint": "^8.55.0",
     "eslint-plugin-react-hooks": "^4.6.0",
     "eslint-plugin-react-refresh": "^0.4.5",
+    "husky": "^9.1.7",
     "jest": "^30.0.0",
     "jest-environment-jsdom": "^30.0.0",
     "postcss": "^8.4.32",