Core: Implement Role based Access Control

- This system will give more control of actions an account can perform.

System defines:
- Permissions to perform some action
- Roles: a set of permissions that have some relation
- Groups: a set of roles that have some relation

Operations:
- Grant: Assign and allow
- Deny: Assign and do not allow
- Revoke: Remove

Precedence to know if something can be done: Grant, Deny. That means, if you are granted some action by a role but you have denied the permission, the action can not be done.

Some Rules:
- Groups can only have roles
- Roles can only have permissions
- An account can be assigned granted and denied roles. Permissions inherited from roles are granted if roles is granted and denied if roles is denied
- An account can be assigned granted and denied permissions
- An account can have multiple groups, roles and permissions
- An account can not have same role granted and denied at same time
- An acconnt can not have same permission granted and denied at same time
- Id 0 can not be used to define a group, role or permission

Added some permissions as a sample of use (Instant Logout, Skip Queue, Join BGs, Join DF) and some permissions as a workaround to commands till command system is modified to use RBAC

src/server/game/Scripting/ScriptLoader.cpp

@@ -70,6 +70,7 @@ void AddSC_mmaps_commandscript();
 void AddSC_modify_commandscript();
 void AddSC_npc_commandscript();
 void AddSC_quest_commandscript();
+void AddSC_rbac_commandscript();
 void AddSC_reload_commandscript();
 void AddSC_reset_commandscript();
 void AddSC_server_commandscript();
@@ -700,6 +701,7 @@ void AddCommandScripts()
     AddSC_modify_commandscript();
     AddSC_npc_commandscript();
     AddSC_quest_commandscript();
+    AddSC_rbac_commandscript();
     AddSC_reload_commandscript();
     AddSC_reset_commandscript();
     AddSC_server_commandscript();