Adding more lobby art to te game!

[wendyribstonpippin]

About the PR

I added three lobby screen arts to the list of arts that can show up, and I hope you like them!

Why / Balance

I originally made these pieces for other servers (and also to just have fun), but I think they'd fit nice enuff' here! I just really like contributing to open source projects, I think art should be shared and given freely for the fun of it, and so this is my way of showing my appreciation.

How to test

I don't have the energy to just restart a whole buncha rounds until the artz show up, but I'm hoping i did things right and that no one has to bother doing that. éwè

Media

Requirements

• I have read and am following the Pull Request and Changelog Guidelines.
• I have added media to this PR or it does not require an ingame showcase.

Changelog
🆑

• add: xisters.png, secmakeover.png and staresblankly.png to the lobby screen rotation
• tweak: changed attributions.yml to reflect the cc status of the pieces i added (cc-by-nc-sa 4.0)
• tweak: changed lobbyscreens.yml so that the artworks would be pulled
• accidental tweak: i kinda sorta deleted lines of code and added identical ones? idk how that happenned. seems to still be as it was before so i guess it's fine but i just thought id mention it just in case.
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[dvir001]

I'll be honest here, while the art is fine we only have Frontier specifically made art added right now.

I'll leave this open if another maintainer think otherwise.

[wendyribstonpippin]

That's completely reasonable! I might make NF-specific art later anyways, so this was also just kind of me taking the opportunity to create a branch specifically for that, for art I'll add later. (also the mime art is a character that i do play quite often on frontier, fwiw)

[GreaseMonk]

I second Dvir's opinion the art looks good, just not relevant to frontier all that much- thank you for submitting your PR though i greatly appreiciate it

Edit: Perhaps just the first one is alright ?

[dvir001]

Going to close this for now, feel free to open another PR if you would like to submit something else.

Thanks.