added talents overview and sheet

- added talents item type:
  - added scss
  - added to template.json (Item.types, Item.talent)
   - added to config.ts itemTypes
   - added type definition
- added localizations
- added talent overview tab to actor sheet
- made total rank calculated upon data preparation
  by adding a prepareData method to DS4Item

src/module/config.ts

@@ -48,6 +48,7 @@ export const DS4 = {
         shield: "DS4.ItemTypeShield",
         trinket: "DS4.ItemTypeTrinket",
         equipment: "DS4.ItemTypeEquipment",
+        talent: "DS4.ItemTypeTalent",
     },
 
     /**