[Bots] Add Bot scripting capabilities to the source. (#1378)

- This will allow server operators to interact with bots within a script in Perl or Lua.

zone/lua_entity.h

@@ -6,6 +6,9 @@
 
 class Entity;
 class Lua_Client;
+#ifdef BOTS
+class Lua_Bot;
+#endif
 class Lua_NPC;
 class Lua_Mob;
 struct Lua_HateList;
@@ -54,6 +57,9 @@ public:
 	Lua_Corpse CastToCorpse();
 	Lua_Object CastToObject();
 	Lua_Door CastToDoor();
+#ifdef BOTS
+	Lua_Bot CastToBot();
+#endif
 };
 
 #endif