fix(PlayerTestUtil): fixes for player creation

[p1k0chu]

• fix Lukynka domain expansion
• fix player being repeatedly added to PlayerManager
• fix World.join(Player) method never being called for test player

This code...

@Test
fun test() {
    TestServer.getOrSetupServer()

    repeat(5) { PlayerTestUtil.getOrCreateFakePlayer() }

    log("world.entities = ${WorldManager.mainWorld.entities}")
    log("PlayerManager.players = ${PlayerManager.players}")
}

Prints this:

✨ Runtime: world.entities = []
✨ Runtime: PlayerManager.players = [LukynkaCZE, LukynkaCZE, LukynkaCZE, LukynkaCZE, LukynkaCZE]

_{wow thats a lot of Lukynkas}

[LukynkaCZE]

That's a lot of me

[LukynkaCZE]

Yknow this is really shit method..
If you look at branch restructure/monorepo I'm working on splitting everything into it's own packages, including protocol. Another change having both read and write methods for every packet meaning I will be able to make actual client with that for testing