Add copy button to toast notifications

[jaydensipe]

Describe the project you are working on

An editor plugin that will utilize toast notifications if godotengine/godot#98680 is merged

Describe the problem or limitation you are having in your project

If godotengine/godot#98680 is merged, the toast notifications that are created in editor (with push_toast method) are not displayed in the console for a user to easily copy, as well as the toast notification label not being selectable.

Describe the feature / enhancement and how it helps to overcome the problem or limitation

Add a copy button to the toast notification

Describe how your proposal will work, with code, pseudo-code, mock-ups, and/or diagrams

Screen.Recording.2024-11-01.235809.mp4

If this enhancement will not be used often, can it be worked around with a few lines of script?

N/A

Is there a reason why this should be core and not an add-on in the asset library?

Should be included with the toast notifications

[Calinou]

• Related to Allow clicking on editor toasts to dismiss them #8155
  and Use a much faster fade duration for editor toasts #8156.