Add auto-registration workflow on tag push

Author: Sixzero

.github/workflows/Register.yml

@@ -0,0 +1,14 @@
+name: Register
+on:
+  push:
+    tags:
+      - 'v*'
+  workflow_dispatch:
+jobs:
+  register:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: JuliaRegistries/RegisterAction@v1
+        with:
+          token: ${{ secrets.GITHUB_TOKEN }}