maint: Switch from `print -P %F{col-nr}` to `m {col-name}`.

[psprint]

The m function is automatically provided for the moment of loading/installing a plugin and it's the same as +zinit-message. With this patch, bgn annex will support theming from https://github.com/zdharma-continuum/zinit/pull/445.

Description

s/print -P --/m …

Motivation and Context

To make messages from bgn annex follow $ZITHEME themes.

Related Issue(s)

https://github.com/zdharma-continuum/zinit/pull/445.

Usage examples

m {pre}bgn-annex:{warn} returned code is {num}1

How Has This Been Tested?

Types of changes

• [x] Bug fix (non-breaking change which fixes an issue)
• [x] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• [ ] My change requires a change to the documentation.
• [ ] I have updated the documentation accordingly.
• [ ] I have added tests to cover my changes.
• [x] All new and existing tests passed.

[psprint]

@vladdoster when merge?

[psprint]

The m function is outside the convention because it's for atclone and similar ices - to be as shortest as possible. However here are atclone hooks not ices so I understand that it can be better to use its full name. Should I change it?

[vladdoster]

This breaks the annex.