[Perl/perl5] 2af251: Add B helpers to check if the Sv is a boolean

[ℕicolas ℝ . via perl5-changes]

  Branch: refs/heads/blead
  Home:   https://github.com/Perl/perl5
  Commit: 2af2513acebd4252429a3df47ef0ddde748b7ae5
      
https://github.com/Perl/perl5/commit/2af2513acebd4252429a3df47ef0ddde748b7ae5
  Author: Nicolas R <nico...@atoomic.org>
  Date:   2022-05-27 (Fri, 27 May 2022)

  Changed paths:
    M MANIFEST
    M ext/B/B.pm
    M ext/B/B.xs
    A ext/B/t/bool.t

  Log Message:
  -----------
  Add B helpers to check if the Sv is a boolean

Bool are using PVNV. It makes it more convenient
to provide these helpers at the top level for any SVs.

So we can easily check if the SV is a boolean and check
if it's true or false.