Lobby refactor + species loadouts support (#27576)

* Vox stuff

* Species loadouts and lobby refactor

The control flow for lobby is all over the shop so I pulled it all up from the individual controls so now they handle the bare minimum required and LobbyUIController handles the rest.

* a

* Bulk changes

* a

* weh

* Character import / export

* finalise

* woops this stuff too

* Also datafield exporting

* comments

* Review

Content.Client/Lobby/IClientPreferencesManager.cs

@@ -0,0 +1,21 @@
+using Content.Shared.Preferences;
+
+namespace Content.Client.Lobby
+{
+    public interface IClientPreferencesManager
+    {
+        event Action OnServerDataLoaded;
+
+        bool ServerDataLoaded => Settings != null;
+
+        GameSettings? Settings { get; }
+        PlayerPreferences? Preferences { get; }
+        void Initialize();
+        void SelectCharacter(ICharacterProfile profile);
+        void SelectCharacter(int slot);
+        void UpdateCharacter(ICharacterProfile profile, int slot);
+        void CreateCharacter(ICharacterProfile profile);
+        void DeleteCharacter(ICharacterProfile profile);
+        void DeleteCharacter(int slot);
+    }
+}