chore: add sync wpord assets workflow

.github/workflows/sync-wporg-assets.yml

@@ -0,0 +1,21 @@
+name: Sync assets with wordpress.org
+
+on:
+  push:
+    branches:
+      - main
+    paths:
+      - 'readme.txt'
+      - '.wordpress-org/**'
+jobs:
+  run:
+    runs-on: ubuntu-latest
+    if: "! contains(github.event.head_commit.message, 'chore(release)')"
+    name: Push assets to WordPress.org
+    steps:
+        - uses: actions/checkout@master
+        - name: WordPress.org plugin asset/readme update
+          uses: selul/action-wordpress-plugin-asset-update@develop
+          env:
+            SVN_PASSWORD: ${{ secrets.SVN_THEMEISLE_PASSWORD }}
+            SVN_USERNAME: ${{ secrets.SVN_THEMEISLE_USERNAME }}