Merge the input method specific *Virtual* types into general Virtual* types

[FlooferLand]

Made from #631 (comment)

Which code could be improved?

src/user_input/keyboard.rs

src/user_input/mouse.rs

src/user_input/gamepad.rs

How should this be changed?

Having several types for each input method doesn't make much sense here and tends to clutter things.
For example, there is no MouseVirtualAxis type right now because it wasn't taken into count, even though I believe the mouse buttons implement Buttonlike.

These ~6 structs could be merged into 3 simpler types: VirtualAxis VirtualDPad, VirtualDPad3d
The implementation would probably use generics and Buttonlike

[alice-i-cecile]

@FlooferLand FYI, the reason why you were getting the "KeyCode does not implement Buttonlike" error is because of the various feature flags:

leafwing-input-manager/Cargo.toml

Line 20 in 63ebdb2

[features]

Feel free to open a draft PR and ask for help from myself and the community there :)

[Shute052]

• This PR Make virtual axial controls more flexible, accepting any kind of Buttonlike #623 might be what you're looking for

[FlooferLand]

• This PR Make virtual axial controls more flexible, accepting any kind of Buttonlike #623 might be what you're looking for

Yes! Exactly what i was looking for.
I will close this now, hopefully that PR gets merged.