Player post-spawn hook and player ghosting controlled by preset (#2734)

* GamePreset: Add a hook to catch all player spawns for modification.

Unless someone makes the entire job system unpluggable, this is what you get...

* GamePreset: Is now in control of voluntary ghosting

* Clean up ghost code to only rely on a player's Mind

Content.Server/GameTicking/GameTicker.cs

@@ -31,6 +31,7 @@ using Robust.Server.Interfaces.Maps;
 using Robust.Server.Interfaces.Player;
 using Robust.Server.Player;
 using Robust.Server.ServerStatus;
+using Robust.Server.Interfaces.Console;
 using Robust.Shared.Enums;
 using Robust.Shared.GameObjects;
 using Robust.Shared.Interfaces.Configuration;
@@ -440,6 +441,11 @@ namespace Content.Server.GameTicking
             UpdateJobsAvailable();
         }
 
+        public bool OnGhostAttempt(Mind mind, bool canReturnGlobal)
+        {
+            return Preset.OnGhostAttempt(mind, canReturnGlobal);
+        }
+
         public T AddGameRule<T>() where T : GameRule, new()
         {
             var instance = _dynamicTypeFactory.CreateInstance<T>();
@@ -887,6 +893,8 @@ namespace Content.Server.GameTicking
             AddSpawnedPosition(jobId);
             EquipIdCard(mob, character.Name, jobPrototype);
             jobPrototype.Special?.AfterEquip(mob);
+
+            Preset.OnSpawnPlayerCompleted(session, mob, lateJoin);
         }
 
         private void EquipIdCard(IEntity mob, string characterName, JobPrototype jobPrototype)