add insets to ioconfig

[mystchonky]

Description

Allows adding insets to ioconfig renderer. This lets it fit in shape/size of screen. Merge before #172.

Create an inset like following and pass it to IOConfigButton constructor:

var inset = new IOConfigButton.Inset(20, 20, 20, 20);

Checklist:

• My code follows the style guidelines of this project (.editorconfig, most IDEs will use this for you).
• I have performed a self-review of my own code.
• I have commented my code in areas it may be challenging to understand.
• I have made corresponding changes to the documentation.
• My changes are ready for review from a contributor.

[Rover656]

Unable to test rn, but code wise looks good; just a code style thing for ya. Cheers!

[Rover656]

lookin good! cheers!!