ci: setup workflow to publish crates to crates.io (#660)

rel: #333 (comment)

Author: sbdchd

.github/workflows/rust.yml

@@ -331,6 +331,27 @@ jobs:
       - name: Check versions are consistent
         run: ./s/check-version
 
+  publish-crates:
+    if: startsWith(github.ref, 'refs/tags/')
+    needs: [build]
+    runs-on: ubuntu-22.04
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Install Toolchain
+        uses: dtolnay/rust-toolchain@4305c38b25d97ef35a8ad1f985ccf2d2242004f2 # stable
+        with:
+          toolchain: 1.90.0
+
+      - name: Cache
+        uses: Swatinem/rust-cache@9d47c6ad4b02e050fd481d890b2ea34778fd09d6 # pin@v2
+
+      - name: Publish to crates.io
+        run: cargo publish --workspace
+        env:
+          CARGO_REGISTRY_TOKEN: ${{ secrets.CRATES_IO_TOKEN }}
+
   publish-vscode:
     if: startsWith(github.ref, 'refs/tags/')
     needs: [build]