fix: Use bun

.forgejo/workflows/build.yml

@@ -11,10 +11,13 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@v4
+      - uses: oven-sh/setup-bun@v2
+        with:
+          bun-version: latest
       - name: Install dependencies
-        run: npm ci
+        run: bun ci
       - name: Build
-        run: npm run build
+        run: bun run build
       - name: Archive production artifacts
         uses: actions/upload-artifact@v4
         with: