chore: add Husky pre-commit hook and Prettier configuration

- Added a pre-commit hook to run lint-staged with pnpm.
- Created .prettierignore to specify files and directories to ignore for Pre

Author: ryota-murakami

.husky/pre-commit

@@ -0,0 +1 @@
+pnpm lint-staged

.prettierignore

@@ -0,0 +1,23 @@
+.DS_Store
+node_modules
+coverage
+
+.husky
+dist
+build
+.next
+
+.gitignore
+.git
+.vscode
+.idea
+
+pnpm-lock.yaml
+.pnpm-store
+package-lock.json
+yarn.lock
+bun.lockb
+
+.playwright-mcp
+playwright-report
+test-results

.prettierrc

@@ -0,0 +1,5 @@
+{
+  "$schema": "https://json.schemastore.org/prettierrc",
+  "singleQuote": true,
+  "semi": false
+}

package.json

@@ -7,11 +7,14 @@
     "build": "next build",
     "start": "next start --port 3009",
     "lint": "eslint . --ext .js,.jsx,.ts,.tsx --max-warnings=0",
+    "lint:fix": "eslint . --ext .js,.jsx,.ts,.tsx --fix --max-warnings=0",
     "typecheck": "tsc --noEmit",
     "e2e": "playwright test",
     "e2e:desktop": "playwright test --project=\"Desktop Chrome\"",
     "e2e:tablet": "playwright test --project=\"Tablet Safari\"",
-    "e2e:mobile": "playwright test --project=\"Mobile Chrome\""
+    "e2e:mobile": "playwright test --project=\"Mobile Chrome\"",
+    "prepare": "husky",
+    "prettier": "prettier --ignore-unknown --write ."
   },
   "dependencies": {
     "@radix-ui/react-dialog": "^1.1.15",
@@ -37,12 +40,18 @@
     "axe-core": "^4.11.0",
     "eslint": "^9.38.0",
     "eslint-config-next": "^16.0.0",
+    "husky": "^9.1.7",
+    "lint-staged": "^16.2.5",
     "postcss": "^8.5.6",
+    "prettier": "^3.6.2",
     "tailwindcss": "^4.1.15",
     "typescript": "^5.9.3"
   },
   "packageManager": "pnpm@10.17.1",
   "volta": {
     "node": "22.20.0"
+  },
+  "lint-staged": {
+    "*": "prettier --ignore-unknown --write"
   }
 }