Replace main workflow with a new mirror workflow for better structure and functionality

Author: valentineus

.github/workflows/main.yml

@@ -0,0 +1,25 @@
+name: Mirror
+
+on:
+  push:
+    branches: [master]
+  pull_request:
+    branches: [master]
+
+permissions:
+  contents: read
+
+jobs:
+  mirror:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+      - name: Mirror to remote repository
+        uses: yesolutions/mirror-action@master
+        with:
+          REMOTE: "https://git.popov.link/moodle/auth_http.git"
+          GIT_USERNAME: ${{ secrets.GIT_USERNAME }}
+          GIT_PASSWORD: ${{ secrets.GIT_PASSWORD }}