ci: add publish job

Author: Brooooooklyn

.github/workflows/release.yml

@@ -0,0 +1,25 @@
+name: Release
+
+on:
+  push:
+    tags:
+      - v*
+
+jobs:
+  release:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+        with:
+          submodules: recursive
+      - name: Install Rust toolchain
+        uses: dtolnay/rust-toolchain@master
+        with:
+          toolchain: stable
+      - name: cargo login
+        run: cargo login ${{ secrets.CRATES_IO_API_TOKEN }}
+      - name: Run publish
+        working-directory: libmimalloc-sys
+        run: cargo publish
+      - name: Run publish
+        run: cargo publish