ci: add release workflow

Signed-off-by: Marco Casaroli <marco.casaroli@gmail.com>

Author: casaroli

.github/workflows/release.yml

@@ -0,0 +1,36 @@
+name: Release Artifacts
+
+on:
+  release:
+    types:
+      - published
+
+jobs:
+  release-artifacts:
+    runs-on: ubuntu-24.04
+    steps:
+      - uses: actions/checkout@v4
+
+      - name: Get last successful run id
+        id: run-id
+        env:
+          GH_TOKEN: ${{ github.token }}
+        run: |
+          last_run_id=$(gh run list -w main.yml -c ${{ github.sha }} -b main -s completed --json databaseId -L 1 | jq -r .[].databaseId)
+          test -z $last_run_id && echo "cannot find last successful run_id" && exit 1 || echo "last_run_id=$last_run_id" && echo "last_run_id=$last_run_id" >> $GITHUB_OUTPUT
+
+      - name: Download sysroot (wasm32-wasip1-threads)
+        uses: actions/download-artifact@v4
+        env:
+          LAST_RUN_ID: ${{ steps.run-id.outputs.last_run_id }}
+        with:
+          name: sysroot-wasm32-wasip1-threads.tgz
+          run-id: ${{ env.LAST_RUN_ID }}
+          path: sysroot-wasm32-wasip1-threads
+
+      - name: Push artifacts to release
+        uses: softprops/action-gh-release@v2
+        with:
+          prerelease: false
+          files: |
+            sysroot-*