✨ feat: implement core Cereale library for JSON mapping and validation

- 🎨 add Spring-like decorators (@JsonSerialize, @JsonDeserialize, etc.)
- ⚙️ implement JsonMapper and metadata storage for transformations
- 🧪 add comprehensive test suite using Vitest
- 📝 add README, CONTRIBUTING, and API documentation
- 👷 setup GitHub Actions CI workflow
- 🔧 configure TypeScript and project settings

tsconfig.json

@@ -6,8 +6,8 @@
     "outDir": "dist",
 
     // Environment Settings
-    "module": "CommonJS",
-    "target": "ES2020",
+    "module": "NodeNext",
+    "target": "ES2025",
     "lib": ["ESNext"],
     "types": ["node"],
 
@@ -36,5 +36,5 @@
     "experimentalDecorators": true
   },
   "include": ["src/**/*"],
-  "exclude": ["node_modules", "dist", "src/**/*.test.ts", "src/example.ts"]
+  "exclude": ["node_modules", "dist", "src/**/*.test.ts"]
 }