maint: add workflow to process incoming PRs

Signed-off-by: Yury V. Zaytsev <[email protected]>

Author: zyv

.github/workflows/process-incoming-prs.yml

@@ -0,0 +1,22 @@
+name: Process incoming PRs
+
+on:
+  pull_request:
+    types: [ opened ]
+
+jobs:
+  label-new-pr:
+    runs-on: ubuntu-latest
+    timeout-minutes: 5
+
+    permissions:
+      pull-requests: write
+
+    steps:
+      - run: |
+          gh pr edit ${{ github.event.pull_request.number }}  \
+            --add-label "needs triage,prio: medium" \
+            --milestone "Future Releases"
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          GH_REPO: ${{ github.repository }}