add lint action

.github/workflows/lint.yml

@@ -0,0 +1,21 @@
+on:
+  workflow_call:
+
+jobs:
+  test:
+    name: Test
+    permissions:
+      contents: read
+    runs-on: ubuntu-22.04
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+      - name: Install Rust toolchain
+        uses: dtolnay/rust-toolchain@master
+        with:
+          toolchain: '1.82.0'
+          components: 'clippy'
+      - name: Cache Rust toolchain
+        uses: Swatinem/[email protected]
+      - name: Test
+        run: make lint

.github/workflows/pr-push.yml

@@ -7,7 +7,6 @@ jobs:
   test:
     name: Test
     uses: ./.github/workflows/test.yml
-    # TODO enable lint.
-#  lint:
-#    name: Lint
-#    uses: ./.github/workflows/lint.yml
+  lint:
+    name: Lint
+    uses: ./.github/workflows/lint.yml

.github/workflows/test.yml

@@ -1,9 +1,6 @@
 on:
   workflow_call:
 
-env:
-  RUST_VERSION: '1.82.0'
-
 jobs:
   test:
     name: Test