Integrate Prettier into project configuration

- Added `eslint-config-prettier` to disable conflicting ESLint rules.
- Configured Prettier with `.prettierrc` for consistent formatting.
- Updated `package.json` scripts to apply and check formatting on entire project.
- Added `.prettierignore` to exclude unnecessary files and directories from formatting.
- Updated dependencies in `package-lock.json` and removed unused packages.

frontend/package-lock.json

@@ -48,7 +48,6 @@
         "zustand": "^4.5.7"
       },
       "devDependencies": {
-        "@eslint/eslintrc": "^3",
         "@hey-api/openapi-ts": "^0.86.11",
         "@next/bundle-analyzer": "^16.0.1",
         "@peculiar/webcrypto": "^1.5.0",
@@ -64,9 +63,11 @@
         "@types/react-dom": "^19",
         "eslint": "^9",
         "eslint-config-next": "15.2.0",
+        "eslint-config-prettier": "^10.1.8",
         "jest": "^30.2.0",
         "jest-environment-jsdom": "^30.2.0",
         "lighthouse": "^12.8.2",
+        "prettier": "^3.6.2",
         "tailwindcss": "^4",
         "typescript": "^5",
         "whatwg-fetch": "^3.6.20"
@@ -8201,6 +8202,22 @@
         }
       }
     },
+    "node_modules/eslint-config-prettier": {
+      "version": "10.1.8",
+      "resolved": "https://registry.npmjs.org/eslint-config-prettier/-/eslint-config-prettier-10.1.8.tgz",
+      "integrity": "sha512-82GZUjRS0p/jganf6q1rEO25VSoHH0hKPCTrgillPjdI/3bgBhAE1QzHrHTizjpRvy6pGAvKjDJtk2pF9NDq8w==",
+      "dev": true,
+      "license": "MIT",
+      "bin": {
+        "eslint-config-prettier": "bin/cli.js"
+      },
+      "funding": {
+        "url": "https://opencollective.com/eslint-config-prettier"
+      },
+      "peerDependencies": {
+        "eslint": ">=7.0.0"
+      }
+    },
     "node_modules/eslint-import-resolver-node": {
       "version": "0.3.9",
       "resolved": "https://registry.npmjs.org/eslint-import-resolver-node/-/eslint-import-resolver-node-0.3.9.tgz",
@@ -14295,6 +14312,22 @@
         "node": ">= 0.8.0"
       }
     },
+    "node_modules/prettier": {
+      "version": "3.6.2",
+      "resolved": "https://registry.npmjs.org/prettier/-/prettier-3.6.2.tgz",
+      "integrity": "sha512-I7AIg5boAr5R0FFtJ6rCfD+LFsWHp81dolrFD8S79U9tb8Az2nGrJncnMSnys+bpQJfRUzqs9hnA81OAA3hCuQ==",
+      "dev": true,
+      "license": "MIT",
+      "bin": {
+        "prettier": "bin/prettier.cjs"
+      },
+      "engines": {
+        "node": ">=14"
+      },
+      "funding": {
+        "url": "https://github.com/prettier/prettier?sponsor=1"
+      }
+    },
     "node_modules/pretty-format": {
       "version": "27.5.1",
       "resolved": "https://registry.npmjs.org/pretty-format/-/pretty-format-27.5.1.tgz",