added compatibility with LeftWM temes

[blackdragon2447]

Adding compatibility to the wm_theme feature for the LeftWM window manager. The current implementation depends on the leftwm-theme tool for querying the theme since LeftWM doesn't have a build in theme querying feature.

[dylanaraps]

Where does leftwm-theme obtain this information from?

[blackdragon2447]

leftwm-theme gets that info from the themes.toml file in leftwm's config dir. (source: https://github.com/leftwm/leftwm-theme/blob/master/src/operations/status.rs)

[hykilpikonna]

Thank you for your contribution!

This PR is merged into hyfetch since this repo (dylanaraps/neofetch) seems no longer maintained.

HyFetch is a fork of neofetch with LGBTQ pride flags, but the repo also maintains an updated version of the original neofetch, addressing many pull requests that are not merged in the original repo.

Read the "Running Updated Original Neofetch" section for more info!

[blackdragon2447]

Hey, Happy to see it merged, guess i gotta switch to hyfetch : )