Adds support for a map rotation system. (#7162)

* Adds support for a map rotation system.
It is now the default way of selecting a map, map votes have been disabled.

* whoops

* Randomize the map it starts off with, too.
(it'd pick bagel every time otherwise)

* Address review

* remove knight from rotation due to it being an unmaintained map.

* minor cleanup

Resources/Prototypes/Maps/game.yml

@@ -88,6 +88,7 @@
     !type:NanotrasenNameGenerator
     prefixCreator: '14'
   mapPath: /Maps/knightship.yml
+  votable: false
   minPlayers: 0
   maxPlayers: 8
   overflowJobs: []