chore: release v0.6.6

Author: subframe7536

package.json

@@ -2,7 +2,7 @@
   "publisher": "subframe7536",
   "name": "custom-ui-style",
   "displayName": "Custom UI Style",
-  "version": "0.6.5",
+  "version": "0.6.6",
   "private": true,
   "packageManager": "pnpm@10.12.1",
   "description": "Custom ui css style in both editor and webview, unify global font family, setup background image",