Move type constants

Prevent problems of circular dependencies when sepating actions from
items & sheets

module/rdd-roll.js

@@ -8,7 +8,7 @@ import { RdDCarac } from "./rdd-carac.js";
 import { RdDResolutionTable } from "./rdd-resolution-table.js";
 import { ReglesOptionnelles } from "./settings/regles-optionnelles.js";
 import { Grammar } from "./grammar.js";
-import { ACTOR_TYPES } from "./item.js";
+import { ACTOR_TYPES } from "./constants.js";
 
 /**
  * Extend the base Dialog entity to select roll parameters