feat(dashboard): Update v2 store domain to follow conventions, and abstract some logic (#6927)

**What**
- Updates the V2 store domain.
- Abstracts some of the API requests logic into re-usable hooks

**Note**
- Partial PR as we need to add support for setting a default currency, region and location. Currently the `q` param is missing on all V2 endpoints, so we can't use our combobox component to list these options. Will be added later when that has been fixed in core.
- The PR includes a generic hook for fetching combobox data, that I added before realising that `q` is not currently supported. But keeping it as it will be useful once support is added.

packages/admin-next/dashboard/public/locales/en-US/translation.json

@@ -618,7 +618,10 @@
     "addCurrencies": "Add currencies",
     "removeCurrencyWarning_one": "You are about to remove {{count}} currency from your store. Ensure that you have removed all prices using the currency before proceeding.",
     "removeCurrencyWarning_other": "You are about to remove {{count}} currencies from your store. Ensure that you have removed all prices using the currencies before proceeding.",
-    "currencyAlreadyAdded": "The currency has already been added to your store."
+    "currencyAlreadyAdded": "The currency has already been added to your store.",
+    "edit": {
+      "header": "Edit Store"
+    }
   },
   "regions": {
     "domain": "Regions",
@@ -1002,4 +1005,4 @@
     "seconds_one": "Second",
     "seconds_other": "Seconds"
   }
-}
+}