Add Github Action cache to improve CI time

.github/workflows/ci.yml

@@ -6,6 +6,18 @@ on:
     branches:
       - main
 
+# Define the cache configuration as an anchor
+cache-config: &cache-config
+  uses: actions/cache@v4.0.2
+  with:
+    path: |
+      ~/.cargo/bin/
+      ~/.cargo/registry/index/
+      ~/.cargo/registry/cache/
+      ~/.cargo/git/db/
+      target/
+    key: ${{ runner.os }}-cargo-${{ hashFiles('**/Cargo.lock') }}
+
 jobs:
   check-fmt:
     runs-on: ubuntu-latest
@@ -21,6 +33,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
+      - *cache-config  # Use the cache configuration
       - uses: actions-rust-lang/setup-rust-toolchain@v1
         with:
           toolchain: stable
@@ -34,6 +47,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
+      - *cache-config
       - uses: actions-rust-lang/setup-rust-toolchain@v1
         with:
           toolchain: stable
@@ -44,6 +58,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
+      - *cache-config
       - uses: actions-rust-lang/setup-rust-toolchain@v1
         with:
           toolchain: stable
@@ -54,6 +69,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
+      - *cache-config
       - run: rustup target add riscv32i-unknown-none-elf
       - run: assets/scripts/smoke.sh examples/src/bin/fib3_profiling.rs
       - run: assets/scripts/smoke.sh examples/src/bin/hello.rs
@@ -63,6 +79,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
+      - *cache-config
       - run: rustup target add riscv32i-unknown-none-elf
       - run: assets/scripts/test_sdk.sh examples/src/bin/hello.rs