add actions forward decl header (#699)

* add actions forward decl header

* newline

* format

* remove existing fwd declares

* Headers

* replace COMPAT_MODE check

* flip

---------

Co-authored-by: Christian Semmler <mail@csemmler.com>

LEGO1/lego/legoomni/include/isle.h

@@ -1,6 +1,7 @@
 #ifndef ISLE_H
 #define ISLE_H
 
+#include "actionsfwd.h"
 #include "legogamestate.h"
 #include "legoworld.h"
 #include "radio.h"
@@ -19,24 +20,6 @@ class RaceCar;
 class Jetski;
 class Act1State;
 
-namespace IsleScript
-{
-#ifdef COMPAT_MODE
-enum Script : int;
-#else
-enum Script;
-#endif
-} // namespace IsleScript
-
-namespace JukeboxScript
-{
-#ifdef COMPAT_MODE
-enum Script : int;
-#else
-enum Script;
-#endif
-} // namespace JukeboxScript
-
 // VTABLE: LEGO1 0x100d6fb8
 // SIZE 0x140
 class Isle : public LegoWorld {