**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.
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