ci: use Bun for linting

Author: pan93412

.github/workflows/lint.yaml

@@ -18,23 +18,13 @@ jobs:
       - name: Checkout
         uses: actions/checkout@v6
 
-      - uses: pnpm/action-setup@v4
-        name: Install pnpm
-        with:
-          version: 10
-          run_install: false
-
-      - name: Install Node.js
-        uses: actions/setup-node@v6
-        with:
-          node-version: 20
-          cache: "pnpm"
+      - uses: oven-sh/setup-bun@v2
 
       - name: Install dependencies
-        run: pnpm install --frozen-lockfile
+        run: bun install --frozen-lockfile
 
       - name: Run Next.js lint check
-        run: pnpm lint
+        run: bun lint
 
       - name: Run dprint format check
-        run: pnpm format:check
+        run: bun format:check