Added github action to keep legacy master branch up to date with late…

…st main

.github/workflows/main-to-master.yml

@@ -0,0 +1,25 @@
+name: Build
+
+on:
+  push:
+    branches:
+      - main
+
+jobs:
+  update-legacy-master:
+    runs-on: ubuntu-latest
+    permissions:
+      contents: write
+    steps:
+    - uses: actions/checkout@v4
+    - name: Push
+      run: |
+        git pull
+        git checkout master
+        git merge --ff main
+        git push origin
+      #uses: ad-m/github-push-action@master
+      #with:
+        #github_token: ${{ secrets.GITHUB_TOKEN }}
+        #force_with_lease: true
+        #branch: master