Tag dtl and dch files with their resource class

[iscke]

(this makes them visible to quick load, should fix #2226)

[Jowan-Spooner]

Hey @iscke, thanks you so much for this, this sounds awesome!

[Jowan-Spooner]

I like this, but I'd need someone to test if this actually works, e.g @zaknafean.

[zaknafean]

Testing out PR #2405 is good! The UI for Timeline COULD get a bit wild, but its a great and simple QoL.

NVIDIA_Share_UHnnev5w8y.mp4

Cons:
UI gets a bit annoying to deal with when you have alot of timelines. I think this is more a godot issue rather than an implementation. I do not believe that should prevent merging at this time.

Godot_v4.3-stable_win64_jAhe9JXW83.mp4

[zaknafean]

Fully tested, and a good QoL for everyone involved. Should merge!