Scripts/FollowerAI: Some cleanup:

- FollowerAI properly resumes follow after evading.
- Removed duplicated getters from CreatureAI (IsEscorted vs IsEscortNPC), they were used to do the same thing
- FollowerAI properly assists in combat.
- FollowerAI properly despawns if quest is abandoned.
- FollowerAI now supports dynamic respawning for escort NPCs.

src/server/scripts/Commands/cs_script_loader.cpp

@@ -57,6 +57,7 @@ void AddSC_tele_commandscript();
 void AddSC_ticket_commandscript();
 void AddSC_titles_commandscript();
 void AddSC_wp_commandscript();
+void AddSC_dev_commandscript();
 
 // The name of this function should match:
 // void Add${NameOfDirectory}Scripts()
@@ -103,4 +104,5 @@ void AddCommandsScripts()
     AddSC_ticket_commandscript();
     AddSC_titles_commandscript();
     AddSC_wp_commandscript();
+    AddSC_dev_commandscript();
 }