feat(optional): add a full optional files includer

- moved anvil.simba to the optional directory
- added more placeholder stuff to the fairy ring interface

optional.simba

@@ -0,0 +1,33 @@
+(*
+Optional Files
+==============
+
+To include all optional files add to your script after WaspLib:
+.. pascal:: {$I WaspLib/optional.simba}
+However, this is not really recommended. You should include only the files you really want to use under the "optional" directory.
+*)
+
+{$IFNDEF WL_OSR}
+  {$I WaspLib/osr.simba}
+{$ENDIF}
+
+{$SCOPEDENUMS ON}
+
+// The following allows individual include files to compile on their own with just having {$I SRL-T/osr.simba}
+// Summary: It includes this file until the current file is reached.
+
+{$IFNDEF WL_ANVIL_INCLUDED}             {$I osr/interfaces/mainscreen/anvil.simba}
+{$IFNDEF WL_TANSCREEN_INCLUDED}         {$I osr/interfaces/mainscreen/tanscreen.simba}
+{$IFNDEF AERO_SILVERSCREEN_INCLUDED}    {$I osr/interfaces/mainscreen/silverscreen.simba}
+{$IFNDEF AERO_CRAFTSCREEN_INCLUDED}     {$I osr/interfaces/mainscreen/craftscreen.simba}
+{$IFNDEF WL_FURNITUREBUILDER_INCLUDED}  {$I osr/interfaces/mainscreen/furniturebuilder.simba}
+{$IFNDEF ANDREW_MUSHTREE_INCLUDED}      {$I osr/interfaces/mainscreen/mushtree.simba}
+
+{$SCOPEDENUMS OFF}
+
+{$ELSE}{$ENDIF}
+{$ELSE}{$ENDIF}
+{$ELSE}{$ENDIF}
+{$ELSE}{$ENDIF}
+{$ELSE}{$ENDIF}
+{$ELSE}{$ENDIF}