Better factions and contractors (#6493)

Intent of this PR: make factions actually matter.

How we're going to do this:

Make factions limit job choices.
Make factions have alternative loadouts that override job uniforms
Make factions be visible in the employment records.
Revert existing faction loadout options or put them behind a preference, in favour of new shit.

code/modules/client/preference_setup/preference_setup.dm

@@ -220,6 +220,10 @@
 	pref = null
 	return ..()
 
+/datum/category_item/player_setup_item/proc/to_client_chat(str)
+	if (pref && pref.client)
+		to_chat(pref.client, str)
+
 /*
 * Called when the item is asked to load per character settings - Only called when sql saves are disabled or unavailable
 */