Official indent size option of 3

Describe your feature request
There are options for different indent sizes. Let’s add an official spacing option of 3

What problem(s) would this feature solve?
Some people think indent sizes of 2 are too small and hard to read, others think indent sizes of 4 are too big and annoying to deal with. A larger indent size of 4 may reduce the available space for code content on each line, which can cause lines to become excessively long, requiring horizontal scrolling or line wrapping, this can make code harder to read and understand.

So an indent size of 3 could be that happy medium.

(please make this a thing)