[feat] Support macOS `isDocumentEdited`

[tauri-apps[bot]]

This issue has been upstreamed from https://github.com/tauri-apps/tauri/issues/3125

Describe the problem

macOS has an indicator for unsaved documents. Would be nice for Tauri to support it

When isDocumentEdited is true, it shows a dot indicator like this:

Describe the solution you'd like

win.set_is_document_edited(bool) win.is_document_edited() -> bool

Alternatives considered

No response

Additional context

isDocumentEdited: https://developer.apple.com/documentation/appkit/nswindow/1419311-isdocumentedited

[joshchngs]

Demo of upstream PR