Boolean to check if a timeline is active

[polgar1]

Is your feature request related to a problem? Please describe.
For a lot of games I have to know if there's an active dialog, so I can disable other interactions and character movement, a boolean that checks if there's an active timeline would be really useful.

Describe the solution you'd like
A bool in the DialogicGameHandler.gd file that we set to true in the start_timeline() function, then set it to false in end_timeline().

Describe alternatives you've considered
First I added this variable to my own Global script, then gave it a new value at the beginning and end of every Dialogic timeline using Dialogic's function calls, which was something I had to do in every timeline, so I gave up and modified the DialogicGameHandler script.

[CakeVR]

Hello, thank you for opening an issue.

You can already check for timelines by checking the following member against null: https://docs.dialogic.pro/classes/class_dialogicgamehandler.html#property-current_timeline

[Pheubel]

Having a separate variable is a bit overkill, since, like cake said, you can already check the current timeline to see if there is a timeline being played.

Although, there might be merit to adding a convenience method like this to the game handler:

func is_playing_timeline() ->bool:
	return current_timeline != null

It would make it easier to understand if the game handler is currently playing a timeline, but you could argue that it isn't needed.