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.

package.json

@@ -19,6 +19,10 @@
     "cache:stats": "pnpm tsx scripts/cache-monitor.ts stats",
     "cache:cleanup": "pnpm tsx scripts/cache-monitor.ts cleanup",
     "cache:clear": "pnpm tsx scripts/cache-monitor.ts clear",
+    "test": "node scripts/test-runner.js",
+    "test:watch": "vitest --watch --reporter=verbose",
+    "test:coverage": "vitest --coverage --reporter=verbose",
+    "test:ui": "vitest --ui",
     "test:story-points": "pnpm tsx scripts/test-story-points.ts",
     "test:jira-fields": "pnpm tsx scripts/test-jira-fields.ts",
     "prettier:format": "prettier --write .",
@@ -71,7 +75,8 @@
     "sharp": "^0.34.5",
     "tailwindcss": "^4.1.14",
     "tsx": "^4.19.2",
-    "typescript": "^5"
+    "typescript": "^5",
+    "vitest": "^2.1.8"
   },
   "lint-staged": {
     "*.{js,jsx,ts,tsx,json,css,md}": [