refactor: replace bun with pnpm (#870)

.github/workflows/ci.yml

@@ -15,8 +15,10 @@ jobs:
       - name: Checkout code
         uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
 
-      - name: Setup bun
-        uses: oven-sh/setup-bun@0c5077e51419868618aeaa5fe8019c62421857d6 # v2
+      - name: Setup pnpm
+        uses: pnpm/action-setup@0e279bb959325dab635dd2c09392533439d90093 # v6.0.8
+        with:
+          package_json_file: ./frontend/package.json
 
       - name: Setup go
         uses: actions/setup-go@4a3601121dd01d1626a1e23e37211e3254c1c06c # v6
@@ -27,27 +29,22 @@ jobs:
         run: go mod download
 
       - name: Install frontend dependencies
-        run: |
-          cd frontend
-          bun install --frozen-lockfile
+        working-directory: ./frontend
+        run: pnpm ci
 
       - name: Set version
-        run: |
-          echo testing > internal/assets/version
+        run: echo testing > internal/assets/version
 
       - name: Lint frontend
-        run: |
-          cd frontend
-          bun run lint
+        working-directory: ./frontend
+        run: pnpm run lint
 
       - name: Build frontend
-        run: |
-          cd frontend
-          bun run build
+        working-directory: ./frontend
+        run: pnpm run build
 
       - name: Copy frontend
-        run: |
-          cp -r frontend/dist internal/assets/dist
+        run: cp -r frontend/dist internal/assets/dist
 
       - name: Run tests
         run: go test -coverprofile=coverage.txt -v ./...