GH: Added a guide for setting up LAN deathmatch.

[Zungrysoft]

Description of Changes

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Added a guide for setting up LAN deathmatch. Contains useful console commands and information about maps. The guide is in docs/deathmatch-setup-guide.txt.

Checklist

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• I have read the LibreQuake contribution guidelines
• I have thoroughly tested my changes to the best of my ability
• I confirm I have not contributed anything that would impact LibreQuake's licensing and usage
• This Pull Request fixes a critical issue that should be reviewed and merged as soon as possible

[pnahratow]

I'm not sure who the target audience of this guide is but it jumps from super basic. "Be connected to same network, go to Online -> Start Game" to console commands and server info keys.

I'm not opposed to this though just wanna point that out. Look at the config here https://gist.github.com/kwadroke/fa978290d86a606de3875fa853d79334 maybe there are some interesting bits worth mentioning here.

I for example wanted to know about how to make a map rotation. sv_nqplayerphysics is interesting as well. This is better than nothing though so thumbs up in any case

[Zungrysoft]

@pnahratow

I'm not sure who the target audience of this guide is but it jumps from super basic. "Be connected to same network, go to Online -> Start Game" to console commands and server info keys.

I've reworked the guide a little bit to hopefully keep all of the advanced stuff separate from the basics. Thanks for your input!

I for example wanted to know about how to make a map rotation.

I didn't think to add this because I figured it wasn't very useful for LAN deathmatch. I'll add a guide for that at the bottom of the infokeys section though.

[MotoLegacy]

Thanks for your work on this, looks good to me. In the future don't worry about merging main into your branch if your branch isn't conflicting since it adds commits :)

[lavenderdotpet]

@Zungrysoft you ready for this to be merged?