[Bots] Add Quest API Support for Limits. (#2522)

* [Bots] Add Quest API Support for Limits.

# Perl
- Add `$client->GetBotCreationLimit()` to Perl.
- Add `$client->GetBotCreationLimit(class_id)` to Perl.
- Add `$client->GetBotRequiredLevel()` to Perl.
- Add `$client->GetBotRequiredLevel(class_id)` to Perl.
- Add `$client->GetBotSpawnLimit()` to Perl.
- Add `$client->GetBotSpawnLimit(class_id)` to Perl.
- Add `$client->SetBotCreationLimit(creation_limit)` to Perl.
- Add `$client->SetBotCreationLimit(creation_limit, class_id)` to Perl.
- Add `$client->SetBotRequiredLevel(required_level)` to Perl.
- Add `$client->SetBotRequiredLevel(required_level, class_id)` to Perl.
- Add `$client->SetBotSpawnLimit(spawn_limit)` to Perl.
- Add `$client->SetBotSpawnLimit(spawn_limit, class_id)` to Perl.
- Add `$entity_list->GetBotListByCharacterID(character_id, class_id)` to Perl.

# Lua
- Add `client:GetBotCreationLimit()` to Lua.
- Add `client:GetBotCreationLimit(class_id)` to Lua.
- Add `client:GetBotRequiredLevel()` to Lua.
- Add `client:GetBotRequiredLevel(class_id)` to Lua.
- Add `client:GetBotSpawnLimit()` to Lua.
- Add `client:GetBotSpawnLimit(class_id)` to Lua.
- Add `client:SetBotCreationLimit(creation_limit)` to Lua.
- Add `client:SetBotCreationLimit(creation_limit, class_id)` to Lua.
- Add `client:SetBotRequiredLevel(required_level)` to Lua.
- Add `client:SetBotRequiredLevel(required_level, class_id)` to Lua.
- Add `client:SetBotSpawnLimit(spawn_limit)` to Lua.
- Add `client:SetBotSpawnLimit(spawn_limit, class_id)` to Lua.
- Add `entity_list:GetBotListByCharacterID(character_id, class_id)` to Lua.

# Notes
- Allows operators to set creation and spawn limits based on class, as well as required level.
- Using the class-inspecific methods sets the global limit or required level.
- Global limits are checked prior to class-specific limits and if they are not met, creation or spawn is disallowed.
- Modified preexisting Quest API to make use of this new stuff under the hood.

* Update bot_command.cpp

* Add client bot file.

zone/lua_entity_list.h

@@ -135,6 +135,7 @@ public:
 	Lua_Bot GetBotByName(std::string bot_name);
 	Lua_Bot_List GetBotList();
 	Lua_Bot_List GetBotListByCharacterID(uint32 character_id);
+	Lua_Bot_List GetBotListByCharacterID(uint32 character_id, uint8 class_id);
 	Lua_Bot_List GetBotListByClientName(std::string client_name);
 	Lua_Bot GetRandomBot();
 	Lua_Bot GetRandomBot(float x, float y, float z, float distance);