mouseop should have movement states

[deltanedas]

Description

so it only has the walking sprites when moving and new standing sprites when standing

@ps3moira

[ps3moira]

I never learned how to make the mice move when walking and stand still when they're not cause of how regular mice are at the time but I can help change that.

[deltanedas]

see i think sloths pr that made mice use movement states and snip snip