ci: add rust-cache action (#844)

.github/workflows/ci.yml

@@ -83,6 +83,9 @@ jobs:
         with:
           rust-version: ${{ env.rust_msrv }}
 
+      - name: Cache Rust artifacts
+        uses: Swatinem/rust-cache@v2
+
       - name: Build
         run: make build
 
@@ -96,6 +99,10 @@ jobs:
           - windows-latest
     steps:
       - uses: actions/checkout@v4
+
+      - name: Cache Rust artifacts
+        uses: Swatinem/rust-cache@v2
+
       - name: Build
         run: cargo build -p iceberg --no-default-features
 
@@ -109,6 +116,9 @@ jobs:
         with:
           rust-version: ${{ env.rust_msrv }}
 
+      - name: Cache Rust artifacts
+        uses: Swatinem/rust-cache@v2
+
       - name: Test
         run: cargo test --no-fail-fast --all-targets --all-features --workspace