Add caching

Signed-off-by: Marcel Müller <neikos@neikos.email>

.forgejo/workflows/ci.yml

@@ -25,6 +25,14 @@ jobs:
       - uses: actions/checkout@v4
       - name: Install Rust
         uses: https://github.com/dtolnay/rust-toolchain@1.88
+      - name: ⚡ Cache
+        uses: actions/cache@v2
+        with:
+          path: |
+            ~/.cargo/registry
+            ~/.cargo/git
+            target
+          key: ${{ runner.os }}-cargo-${{ hashFiles('**/Cargo.lock') }}
       - run: cargo clippy -- -D warnings
       - run: cargo build --verbose -D warn
       - run: cargo test --verbose