Add ACNH UI inspired hover effects for buttons and inputs

[cmargroff]

No description provided.

[theRTC204]

I appreciate what you're doing here, however there are some quirks with this change on mobile devices.

The hover effects on radios don't work at all on mobile devices.

Also, empty inputs play the hover animation the entire time they are active; but don't play any animation if they are active but not empty.

[cmargroff]

• I did light mobile testing. Mobile hover effects obviously aren't available. I originally tested having the scrolling background on selected but it was too much on screen at once. I don't think its feasible to implement this animation on mobile.

• I simply modified their :hover styles, they have a there are :placeholder-shown clauses on the input rules. I didn't want to change original functionality just styles.