Add caching and artefacts to workflow.

.github/workflows/rust.yml

@@ -15,8 +15,21 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-    - uses: actions/checkout@v3
+    - uses: actions/checkout@v4
+    - uses: actions/cache@v4
+      with:
+        path: |
+          ~/.cargo/bin/
+          ~/.cargo/registry/index/
+          ~/.cargo/registry/cache/
+          ~/.cargo/git/db/
+          target/
+        key: ubuntu-latest-cargo-build-stable-${{ hashFiles('**/Cargo.toml') }}
     - name: Build
       run: cargo build --verbose
     - name: Run tests
       run: cargo test --verbose
+    - name: Upload a Build Artifact
+      uses: actions/[email protected]
+      with:
+        path: target/debug/simple_render_window