Rat King changed to Antag (#38124)

Rat King changed to Antag (#38124)

* Changed rat king to be antag
Rat King guide updated to show antag rules

Initial infected given zombie faction
Zombies given zombie faction too (not sure if redundant or not)

* Given zombie faction to Initial Infected and Zombies in mind_roles

* Changed MindRoleGhostRoleAntag to MindRoleGhostRoleSoloAntagonist

removed components from antag listings

* Removed changes for zombies

* Update Resources/Prototypes/Roles/Antags/zombie.yml

Co-authored-by: Errant <35878406+Errant-4@users.noreply.github.com>
* Update Resources/Prototypes/ai_factions.yml

Co-authored-by: Errant <35878406+Errant-4@users.noreply.github.com>
* Changed mob prototype to match

* Forgot solo again

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Co-authored-by: Errant <35878406+Errant-4@users.noreply.github.com>