External/standalone version of the editor

[Crystalwarrior]

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

Being able to use the timeline editor outside of Godot would be nice. Godot doesn't like plugins very much and we keep running into annoying issues associated with that so having an option to use the plugin as standalone would help in those scenarios where Godot does not cooperate.

[AnidemDex]

This is interesting but we'll need A kind of UI prototype for it