Crystal: Proposal: Rename File::Stat to FileInfo

[lbguilherme]

Crystal is moving to be supported in non posix plataforms (#3582). But some of the standard library api have posixisms in place, and my proposal is to remove some of them.

File::Stat represents information about a file and I think it would be best if it was designed to represent this concept and not simply be a direct copy of posix names. Today you do: File.lstat("foo").mtime and it could be: File.info("foo", follow_links: false).modification_time. Qt does a similar thing: QFileInfo.

(Probably there will be more proposals like this)

[luislavena]

Perhaps File::Info suits better? (following the idea of avoid repeating the parent namespace word).

In the case of modification_time, perhaps modified_time fits better, since is a bit shorter :wink:

[sevk]

include File::Info
File.new("foo").mtime

I think this is better 😄

[bcardiff]

I think is solved in #5584