Add auto-tag workflow to move v1 tag on main pushes

.github/workflows/auto-tag.yml

@@ -0,0 +1,18 @@
+name: Auto-tag main
+
+on:
+  push:
+    branches: [main]
+
+permissions:
+  contents: write
+
+jobs:
+  tag:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - name: Force-update v1 tag
+        run: |
+          git tag -f v1
+          git push -f origin v1