Split ujust recipes into appropriately distinct packages

[bsherman]

I've been thinking recently about how best to facilitate shared code (eg, ujust recipes) which are no doubt useful, very much desired in aurora/bluefin/bazzite, but seem somewhat out of scope for main images.

I suggest creating a few new packages which would still be built in this repo, but would split out some of the less "core" recipes.

1st suggested new package: ublue-os-just-nvidia:

• seems like a no brainer long overdue
• this would contain only the /usr/share/ublue-os/just/40-nvidia.just file
• obviously non-nvidia machines don't need this

2nd suggested new package: ublue-os-just-extras:

• this would include things which may be desirable but have been focused for use in our downstreams, not specifically main
• things to possibly move here:
  • brew
  • install-obs-studio-portable
• things which could be added here:
  • Oh my ZSH
  • any other ujust recipe currently both in bazzite and bluefin but not yet in config

[bsherman]

@ublue-os/approver @ublue-os/member

I welcome feedback on this. Assuming we have consensus, I'll move this to "TODO" in Project Goals and someone can implement.

[noelmiller]

I think this is a good idea. Trying to scope things to appropriate categories allows contributors to know where to contribute to.

[dylanmtaylor]

I love this idea. We probably need to split gnome and KDE specific tweaks too

[m2Giles]

I agree that we should consider splitting this more. There is a lot of duplicative work in bazzite/bluefin that could possibly be pushed to config if we split packages.