mako: add center-left & center-right

[dezren39]

Description

add center-left and center-right

https://man.archlinux.org/man/mako.5.en

Checklist

• Change is backwards compatible.

• Code formatted with ./format.

• Code tested through nix-shell --pure tests -A run.all or nix develop --ignore-environment .#all using Flakes.

• Test cases updated/added. See example.

• Commit messages are formatted like

  {component}: {description}
  
  {long description}
  

  See CONTRIBUTING for more information and recent commit messages for examples.

• If this PR adds a new module

  • Added myself as module maintainer. See example.

Maintainer CC

[dezren39]

@onny i see you as a maintainer i'd appreciate a review if you have time.

[Lillecarl]

I'm not best friends with the detail this module tracks makos config format with, but the change looks good.

[rycee]

Thanks! Merged to master now 🙂