[Fix] Address PR review feedback for starting gold feature

- Disabled denominations now receive 0 at character creation
- Replace CharacterGoldField subclass with GoldField options callback;
  initial value logic now lives in character.mjs
- Use formInput instead of plain text inputs for denomination labels
- Rename "Quantity Name" column header to "Denomination"
- Remove initialCurrency from resourceConfig and currency sync from
  refreshConfig (no longer needed)

lang/en.json

@@ -2888,7 +2888,7 @@
                     "iconNameHint": "Icons are from fontawesome",
                     "bagName": "Bag Name",
                     "chestName": "Chest Name",
-                    "quantityName": "Quantity Name",
+                    "denomination": "Denomination",
                     "initialAmount": "Starting Amount"
                 },
                 "domains": {