feat(tests): integrate Vitest for testing framework and add test scripts

- Added Vitest as a dependency for improved testing capabilities.
- Updated package.json with new test scripts for running tests, watching, and coverage reporting.
- Configured ESLint to recognize test runner scripts and included them in the linting process.
- Modified tsconfig.json to include Vitest types for better TypeScript support in tests.

tsconfig.json

@@ -13,6 +13,7 @@
     "isolatedModules": true,
     "jsx": "preserve",
     "incremental": true,
+    "types": ["vitest/globals"],
     "plugins": [
       {
         "name": "next"
@@ -22,6 +23,12 @@
       "@/*": ["./src/*"]
     }
   },
-  "include": ["next-env.d.ts", "**/*.ts", "**/*.tsx", ".next/types/**/*.ts"],
+  "include": [
+    "next-env.d.ts",
+    "vitest.d.ts",
+    "**/*.ts",
+    "**/*.tsx",
+    ".next/types/**/*.ts"
+  ],
   "exclude": ["node_modules"]
 }