Add Nobara

[PoorPocketsMcNewHold]

WARNING:root:Unknow Linux detected: {'id': 'nobara', 'version': '40', 'version_parts': {'major': '40', 'minor': '', 'build_number': ''}, 'like': 'rhel centos fedora', 'codename': ''}. You can report this warning to the extra-platforms project to improve detection heuristics.

https://nobaraproject.org

Tried to follow #94 to know what to modify and add.
There's mostly only two things of note.

• Instead of using a loose Unicode icon for the Nobara OS, or just not adding any, I've used a NerdFont icon instead  (nf-linux-nobara/f380). So it will actually display correctly only when using a supported font. Otherwise, it will appear as an unknown or invisible character depending on the fonts.
• I may have added the check, in all places. Making me think, the python script might try to check for Nobara multiple times (For example, It will check if it detect it is a UNIX like OS, and if it detects it is based on LINUX). Seems usual for the project, and doesn't seems to affect actual IRL performance.

[kdeldycke]

Thanks @PoorPocketsMcNewHold for the contribution! And thanks for trying to add all the little details for a new distribution!

You opened the pandora box about the possibility for icons to be NerdFont-based. I'm ok with your proposal. We'll see if it make sense in the future to have a separate property to distinguish NerdFont icon from emoji icons. In the mean time, looks good to me!

Let's merge. And I'll fix some test failures before pushing a release.