Request: Idle Animation access via API

[lualucky]

It would be nice to directly read current idle, read list of all idle animations, and set the idle animation via API. For a plugin there is currently no way to temporarily switch to an idle animation, which makes them impossible to use except via toggling different hotkeys, which requires a lot of user set up.

[DenchiSoft]

Still figuring out some details, but I'll implement this in a similar way to the "Toggle Expressions" API:

https://github.com/DenchiSoft/VTubeStudio#requesting-execution-of-hotkeys