cache cargo output for faster build and test (#123)

.github/workflows/pull_request.yml

@@ -42,6 +42,16 @@ jobs:
         shell: bash
         run: rustup target add ${{ matrix.target }}
 
+      - uses: actions/cache@v4
+        with:
+          path: |
+            ~/.cargo/bin/
+            ~/.cargo/registry/index/
+            ~/.cargo/registry/cache/
+            ~/.cargo/git/db/
+            target/
+          key: ${{ runner.arch }}-${{ runner.os }}-cargo-${{ hashFiles('**/Cargo.lock') }}
+
       - name: Install latest nextest release
         uses: taiki-e/install-action@nextest
 
@@ -83,6 +93,16 @@ jobs:
       - name: Install Trunk
         uses: trunk-io/trunk-action/install@54ccfcf9add644a36a5aa1d0046c92f654ff9e45
 
+      - uses: actions/cache@v4
+        with:
+          path: |
+            ~/.cargo/bin/
+            ~/.cargo/registry/index/
+            ~/.cargo/registry/cache/
+            ~/.cargo/git/db/
+            target/
+          key: ${{ runner.arch }}-${{ runner.os }}-cargo-${{ hashFiles('**/Cargo.lock') }}
+
       - name: Install nextest
         if: matrix.target != 'aarch64-unknown-linux-musl'
         run: curl -LsSf https://get.nexte.st/latest/linux | tar zxf - -C ${CARGO_HOME:-~/.cargo}/bin