feat(validation): Implement form validation and error handling utilities

- Add validation rules for form fields with XSS protection
- Create API error handler to parse and manage server validation errors
- Integrate validation rules into contact and inquiries forms
- Enhance error handling with user feedback for form submissions
- Introduce unit tests for validation and error handling functionalities

package.json

@@ -5,7 +5,9 @@
   "scripts": {
     "dev": "next dev --turbopack",
     "build": "next build --turbopack",
-    "start": "next start"
+    "start": "next start",
+    "test": "jest",
+    "test:watch": "jest --watch"
   },
   "dependencies": {
     "@hcaptcha/react-hcaptcha": "^1.16.0",
@@ -24,10 +26,13 @@
   },
   "devDependencies": {
     "@tailwindcss/postcss": "^4",
+    "@types/jest": "^30.0.0",
     "@types/node": "^20",
     "@types/react": "^19",
     "@types/react-dom": "^19",
+    "jest": "^30.2.0",
     "tailwindcss": "^4",
+    "ts-jest": "^29.4.6",
     "typescript": "^5"
   }
 }