ci(workflows): use sccache for faster compilation

.github/workflows/ci.yml

@@ -13,6 +13,9 @@ env:
   # prevents out of disk space error
   CARGO_INCREMENTAL: 0
   CARGO_PROFILE_DEV_DEBUG: 0
+  # enable caching for faster compilation
+  SCCACHE_GHA_ENABLED: "true"
+  RUSTC_WRAPPER: "sccache"
 
 jobs:
   build:
@@ -29,6 +32,9 @@ jobs:
         with:
           components: clippy
 
+      - name: Run sccache-cache
+        uses: mozilla-actions/[email protected]
+
       - name: Setup Rust cache
         uses: Swatinem/rust-cache@v2
 
@@ -75,6 +81,9 @@ jobs:
       - name: Install Rust
         uses: dtolnay/rust-toolchain@stable
 
+      - name: Run sccache-cache
+        uses: mozilla-actions/[email protected]
+
       - name: Setup Rust cache
         uses: Swatinem/rust-cache@v2