feat: Add example multi-job caching workflow

.github/workflows/multi-job-cache.yml

@@ -0,0 +1,74 @@
+name: multi-job-cache
+
+on: [push, pull_request]
+
+permissions: {}
+
+jobs:
+  multi-job-cache-1:
+    if: github.repository == 'Swatinem/rust-cache'
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest, macos-latest, windows-latest]
+
+    name: Test multi-job cache (1) on ${{ matrix.os }}
+    runs-on: ${{ matrix.os }}
+
+    env:
+      CARGO_TERM_COLOR: always
+
+    steps:
+      - name: checkout
+        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+        with:
+          persist-credentials: false
+
+      - name: install rust toolchain
+        run: rustup toolchain install stable --profile minimal --target wasm32-unknown-unknown --no-self-update
+
+      - name: cache
+        uses: ./
+        with:
+          workspaces: |
+            tests
+          add-job-id-key: "false"
+          add-rust-environment-hash-key: "false"
+
+      - name: cargo check (tests)
+        working-directory: tests
+        run: cargo check
+
+  multi-job-cache-2:
+    if: github.repository == 'Swatinem/rust-cache'
+    strategy:
+      fail-fast: false
+      matrix:
+        os: [ubuntu-latest, macos-latest, windows-latest]
+
+    name: Test multi-job cache (2) on ${{ matrix.os }}
+    runs-on: ${{ matrix.os }}
+
+    env:
+      CARGO_TERM_COLOR: always
+
+    steps:
+      - name: checkout
+        uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0
+        with:
+          persist-credentials: false
+
+      - name: install rust toolchain
+        run: rustup toolchain install stable --profile minimal --target wasm32-unknown-unknown --no-self-update
+
+      - name: cache
+        uses: ./
+        with:
+          workspaces: |
+            tests/wasm-workspace
+          add-job-id-key: "false"
+          add-rust-environment-hash-key: "false"
+
+      - name: cargo check (tests/wasm-workspace)
+        working-directory: tests/wasm-workspace
+        run: cargo check