Menu for toggling art assets

[EchoFrost]

Specifically we need a way to toggle the different sprite sets that were developed for the project.

Art assets are located in the Our Home. Drive repository.

Perhaps we should develop a more general options menu that encapsulates this feature, the voice menu, the preferences menu, and any other menu that might be relevant.

For now let's keep the current sprite set as the default for the project.

[Meyvol]

Mostly for me:
When rebuilding the options menu, attempt to include preview of what the user has changed to, such as showing the currently selected sets version of Emily, Lauren, or Maria.

[Meyvol]

Just so I don't lose this example from renpytom:

`
init python:
def PickSprite(d)
return ConditionSwitch(
"persistent.new_sprites", "new/" + d,
"True", "old/" + d)

image eileen happy = PickSprite("eileen happy.png")
`

[Meyvol]

Things to consider:
-Possibly rename Preferences to Options
-The Voice options already built into the main menu should be merged as planned into the options menu. Preferably onto a second page, sharing a sprite preview area with the asset selection menu.
Going to be easier to just link to the voice change menu on the Preferences screen.
-The Voice menu has a sprite hover preview built into each characters' voice toggle selection. This will need to be adapted for the asset swapping menu. Both so it shows the selected asset set when hovering over the character that is being toggled, rather than the default assets, and so that the asset selections can be shown to the user.
The Voice menu needs a 'Toggle All' functionality added I'm lame.

[Meyvol]

Revisiting this issue shortly. Time is relative though.