leftwm: add module

[sevenautumns]

Description

Adds the LeftWM window manager

Checklist

• [x] Change is backwards compatible.

• [x] Code formatted with ./format.

• [x] Code tested through nix-shell --pure tests -A run.all. On my system (Arch btw) all test pass except for nnn. But the test fails with and without my commit.

• [x] Test cases updated/added. See example.

• [x] 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

  • [x] Added myself as module maintainer. See example.

  • [x] Added myself and the module files to .github/CODEOWNERS.

[sevenautumns]

@berbiche I tried to apply all of your suggestions.
Furthermore I added types.attrsOf (types.either types.package themeSubmodule) to themes as well. This way individual themes can be included as packages too.

I extended the leftwm-theme-test for the new possibilities.

Should I squash my commits or will the commits be squashed on merge?

[sevenautumns]

all test pass except for nnn

Thanks to b3af91d, all tests pass now

[berbiche]

Hi, I'll finish my review next week when I have time.

[sevenautumns]

@berbiche
I simplified the theme config in a way that only packages and subattribute packages are expected. This way we do not lose any documentation and the documentation itself is lighter.

[sevenautumns]

@berbiche Can I request another review from you?

[berbiche]

@berbiche Can I request another review from you?

Sure, I'll review this as soon as possible.

[stale[bot]]

Thank you for your contribution! I marked this pull request as stale due to inactivity. Please read the relevant sections below before commenting.

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[water-sucks]

This has gotten a little stale, and LeftWM has adopted a new configuration format and deprecated TOML as a configuration format going forward.

I have a similar module and RON config file generator that I've been using inside my own personal configuration for a while, and was wondering what the current status of this PR was before I filed a PR with my own take on implementing a LeftWM module.

[stale[bot]]

Thank you for your contribution! I marked this pull request as stale due to inactivity. Please read the relevant sections below before commenting.

If you are the original author of the PR

• GitHub sometimes doesn't notify people who commented / reviewed a PR previously when you (force) push commits. If you have addressed the reviews you can officially ask for a review from those who commented to you or anyone else.
• If it is unfinished but you plan to finish it, please mark it as a draft.
• If you don't expect to work on it any time soon, please consider closing it with a short comment encouraging someone else to pick up your work.
• To get things rolling again, rebase the PR against the target branch and address valid comments.

If you are not the original author of the PR

• If you want to pick up the work on this PR, please create a new PR and indicate that it supercedes and closes this PR.