Add mirror workflow

Signed-off-by: Raul Sanchez-Mateos <[email protected]>

.github/workflows/mirror.yml

@@ -0,0 +1,25 @@
+name: mirror-branch
+
+on:
+  push:
+    branches:
+      - 'main'
+
+jobs:
+  mirror_job_main:
+    if: github.ref == 'refs/heads/main'
+    runs-on: ubuntu-latest
+    name: Mirror main branch to API & ABI compatible minor version branches
+    strategy:
+      fail-fast: false
+      matrix:
+          dest_branch:
+            - '1.x'
+    steps:
+      - name: Mirror action step
+        id: mirror
+        uses: eProsima/eProsima-CI/external/mirror-branch-action@v0
+        with:
+            github-token: ${{ secrets.GITHUB_TOKEN }}
+            source: 'main'
+            dest: ${{ matrix.dest_branch }}