chore: introduce ESlint (#201)

package.json

@@ -7,17 +7,29 @@
     "test": "vitest",
     "coverage": "vitest run --coverage",
     "e2e": "playwright test",
-    "report": "playwright show-report"
+    "report": "playwright show-report",
+    "lint": "eslint",
+    "lint:fix": "eslint --fix"
   },
   "devDependencies": {
+    "@next/eslint-plugin-next": "^15.3.0",
     "@playwright/test": "^1.48.2",
     "@types/node": "^22.8.1",
     "@vitest/coverage-v8": "^1.6.0",
+    "eslint": "^9.24.0",
+    "eslint-config-next": "^15.3.0",
+    "eslint-config-prettier": "^10.1.2",
+    "eslint-plugin-import": "^2.31.0",
+    "eslint-plugin-only-warn": "^1.1.0",
+    "eslint-plugin-react": "^7.37.5",
+    "eslint-plugin-unused-imports": "^4.1.4",
     "express": "^4.21.0",
+    "globals": "^16.0.0",
     "prettier": "^3.3.3",
     "sequelize": "^6.37.4",
     "sqlite3": "^5.1.7",
     "supertest": "^7.0.0",
+    "typescript-eslint": "^8.24.1",
     "vitest": "^1.6.0"
   }
 }