feat: SRB2 Kart Support

[Graysongdl]

What is this feature about?
Requesting support for SRB2 Kart

Additional context/references
This is my first time requesting for something like this, and I'm not an experienced developer or anything like that, but I'll do my best to provide as much info as I can, in case it makes for a better jumping off point.

SRB2 Kart is a total conversion mod of Sonic Robo Blast 2, which is based on a modified version of Doom Legacy. You might be able to kill two birds with one stone considering SRB2 Kart is based on SRB2's code, but I have no idea whether the two games are similar enough for that to work or not, since Kart is completely standalone, is actually based on an older version of SRB2, and has been modified so heavily that it's basically unrecognizable.

The master server for SRB2 Kart can be found here, and the master server for regular SRB2 can be found here

As far as I can tell, servers send POST requests to the master server to list themselves there, update themselves periodically, and delist themselves. Although the API itself doesn't seem to have any good way to request server info for any of the servers on it. There's like 3 possible GET requests and they all seem useless. Here it is if you wanna look at it anyway: https://ms.kartkrew.org/tools/api/2.2/

Regular SRB2's API seems basically the same (although base SRB2 divides its server list into multiple "rooms" based on the type of gameplay the server is meant to offer), as seen here: https://mb.srb2.org/MS/tools/api/v1/

Seems like someone made something that is able to request info from a SRB2 or SRB2 Kart server. No clue how to use it, but it seems to exist in php form, as well as a python implementation made by someone else. No idea if either of those would help, but I figured I should share since it seemed vaguely related enough that it might provide some insight.

Well, that's all the info I could think to include. Again, I'm no coder, but let me know if there's anything I can do to help!

[CosminPerRam]

The protocol (to server, not master) seems to be a bit finicky but its another protocol that we could add for sure! Unfortunately I can't give an ETA but it's on the list (:

This is my first time requesting for something like this, and I'm not an experienced developer or anything like that, but I'll do my best to provide as much info as I can, in case it makes for a better jumping off point.

You provided more than excellent info, thanks bunch :D