CI: Add local forgejo CI

Signed-off-by: Vasiliy Doylov <nekocwd@mainlining.org>

.forgejo/workflows/sync-with-upstream.yaml

@@ -0,0 +1,18 @@
+name: Sync fork with upstream
+run-name: Sync fork with upstream
+on:
+  schedule:
+    - cron: "@daily"
+  workflow_dispatch:
+
+jobs:
+  sync:
+    name: Sync
+    runs-on: Misc
+    steps:
+      - name: Sync repository with upstream
+        uses: actions/sync-with-mirror@main
+        with:
+          secret: ${{ secrets.PUSH_TOKEN }}
+          name: pmbootstrap
+          branch: master