updates on package.json:

* adds test and lint scripts commands
* adding: jest for tesing
* adding: eslint for linting
* adding required types
* replace ts-node with tsx

package.json

@@ -17,11 +17,21 @@
   "scripts": {
     "build": "tsc",
     "start": "node dist/index.js",
-    "dev": "ts-node src/index.js"
+    "dev": "tsx watch src/index.ts",
+    "test": "jest",
+    "test:watch": "jest --watch",
+    "lint": "eslint src/**/*.ts",
+    "lint:fix": "eslint src/**/*.ts --fix"
   },
   "devDependencies": {
+    "@types/jest": "^30.0.0",
     "@types/node": "^24.1.0",
-    "ts-node": "^10.9.2",
+    "@typescript-eslint/eslint-plugin": "^8.38.0",
+    "@typescript-eslint/parser": "^8.38.0",
+    "eslint": "^9.32.0",
+    "jest": "^30.0.5",
+    "ts-jest": "^29.4.0",
+    "tsx": "^4.20.3",
     "typescript": "^5.8.3"
   }
 }