Add the pull request merger workflow.

Signed-off-by: Tim 'mithro' Ansell <tansell@google.com>
Signed-off-by: Amr Adel Gouhar <aagouhar@efabless.com>

.github/workflows/modules-pr-backporter.yml

@@ -0,0 +1,37 @@
+# Copyright 2021 The SkyWater PDK Authors
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#     https://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#
+# SPDX-License-Identifier: Apache-2.0
+
+name: Pull Request Back Porter
+
+on:
+  pull_request_target:
+  workflow_run:
+    workflows: ['**']
+    branches: ['backport/**']
+
+jobs:
+
+  Run:
+    runs-on: ubuntu-latest
+
+    steps:
+
+    - uses: crazy-max/ghaction-dump-context@v1
+      name: Dump context
+
+    - uses: mithro/skywater-pdk-actions/modules-pr-backporter@main
+      env:
+        SSH_DEPLOY_KEY: ${{ secrets.SSH_PRIVATE_KEY }}