switch to pnpm

.github/workflows/pr.yml

@@ -19,17 +19,16 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@v4
-      - name: Bun Setup
-        uses: oven-sh/setup-bun@v2
+      - uses: pnpm/setup@v1
         with:
-          bun-version-file: '.tool-versions'
-      - name: Install
-        run: bun install
+          version: 11
+          runtime: node@24
+          cache: true
       - name: Lint
-        run: bun lint
+        run: pnpm lint
       - name: Svelte Check
-        run: bun check
+        run: pnpm check
       - name: Test
-        run: bun run test:unit
+        run: pnpm run test:unit
       - name: Build
-        run: bun run build
+        run: pnpm run build