ci: use builtin:checkout and cache pnpm store

.gitea/workflows/ci.yaml

@@ -18,12 +18,23 @@ jobs:
     timeout-minutes: 10
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: builtin:checkout
       - uses: pnpm/action-setup@v4
       - name: Install Node
         uses: actions/setup-node@v4
         with:
           node-version: 22
+      - name: Get pnpm store directory
+        id: pnpm-store
+        shell: bash
+        run: echo "dir=$(pnpm store path --silent)" >> "$GITHUB_OUTPUT"
+      - name: Cache pnpm store
+        uses: actions/cache@v4
+        with:
+          path: ${{ steps.pnpm-store.outputs.dir }}
+          key: ${{ runner.os }}-pnpm-store-${{ hashFiles('pnpm-lock.yaml') }}
+          restore-keys: |
+            ${{ runner.os }}-pnpm-store-
       - name: Install Dependencies
         run: pnpm install --frozen-lockfile
       - name: Lint
@@ -37,8 +48,19 @@ jobs:
     timeout-minutes: 10
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: builtin:checkout
       - uses: pnpm/action-setup@v4
+      - name: Get pnpm store directory
+        id: pnpm-store
+        shell: bash
+        run: echo "dir=$(pnpm store path --silent)" >> "$GITHUB_OUTPUT"
+      - name: Cache pnpm store
+        uses: actions/cache@v4
+        with:
+          path: ${{ steps.pnpm-store.outputs.dir }}
+          key: ${{ runner.os }}-pnpm-store-${{ hashFiles('pnpm-lock.yaml') }}
+          restore-keys: |
+            ${{ runner.os }}-pnpm-store-
       - name: Install Dependencies
         run: pnpm install --frozen-lockfile
       - name: Run Tests