feat: extension Window Management for macOS (#892)

* feat: extension Window Management for macOS

* release note

* revert frontend code changes

* new line char

* remove todo

* it is macos-only

* format code

* macos-only

* more conditional compilation

* correct field Document.icon

Author: SteveLauC

docs/content.en/docs/release-notes/_index.md

@@ -24,6 +24,7 @@ Information about release notes of Coco App is provided here.
 - feat: support context menu in debug mode #882
 - feat: file search for Linux/GNOME #884
 - feat: file search for Linux/KDE #886
+- feat: extension Window Management for macOS #892
 
 
 ### 🐛 Bug fix