Feature request: Two different indentation width options, one for code, one for pre-processor directives

[hartwork]

Bugzilla Link	42919
Version	unspecified
OS	All
CC	@claudiusaiz

Extended Description

It seems like option "IndentWidth" effects both C/C++ code indentation width as well as pre-processor indentation width. What I have seen a few times is that pre-processor indentation uses a single space per level while the C/C++ code in the same file uses 2 or 4 spaces. "IndentWidth" seems to affect both widths which also means that pre-processor code will look very noise when "IndentWidth" is more than 2.

So it would be great to have two options, "IndentWidth" and a new one "IndentWidthPP"(?), thinking of existing "IndentPPDirectives".

Would that be possible?

Thanks in advance!

[MaskRay]

The feature will be useful for compiler-rt and glibc (https://sourceware.org/pipermail/libc-alpha/2022-March/137362.html).