- Move all DataModel item files to a new 'items' subfolder for better organization

- Add _module.mjs file to simplify imports
- Update all import paths
- Rename class for use the new acronym DH

module/data/consumable.mjs

@@ -1,10 +0,0 @@
-export default class DhpConsumable extends foundry.abstract.TypeDataModel {
-    static defineSchema() {
-        const fields = foundry.data.fields;
-        return {
-            description: new fields.HTMLField({}),
-            quantity: new fields.NumberField({ initial: 1, integer: true }),
-            consumeOnUse: new fields.BooleanField({ initial: false })
-        };
-    }
-}