Remove ESLint configuration and related dependencies from frontend project

- Deleted eslint.config.js file to streamline project setup.
- Removed ESLint and related packages from package.json to simplify development environment.

package.json

@@ -0,0 +1,30 @@
+{
+  "name": "personal-finances",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "dev": "concurrently 'cd frontend-web && bun run dev' 'cd backend-api && bun run dev'",
+    "lint": "eslint .",
+    "lint:fix": "eslint . --fix"
+  },
+  "repository": {
+    "type": "git",
+    "url": "https://git.techniker.me/techniker-me/personal-finance.git"
+  },
+  "keywords": [],
+  "author": "",
+  "license": "ISC",
+  "type": "module",
+  "dependencies": {
+    "concurrently": "^9.2.1"
+  },
+  "devDependencies": {
+    "@eslint/js": "^9.39.1",
+    "eslint": "^9.39.1",
+    "eslint-plugin-react-hooks": "^7.0.1",
+    "eslint-plugin-react-refresh": "^0.4.24",
+    "globals": "^16.5.0",
+    "typescript-eslint": "^8.46.4"
+  }
+}