Issues Addressed:
- Missing provinces (e.g., Ceuta, Melilla).
- Incorrect inclusion of states as provinces (e.g., Andalucía).
- Inclusion of a province from another country (e.g., Nouvelle-Calédonie).
Solution:
This update provides an accurate list of Spain's provinces based on the ISO 3166-2 standard. Reference: [ISO 3166-2:ES - Provincias](https://es.wikipedia.org/wiki/ISO_3166-2:ES#Provincias).
**What**
- Renames /admin-next -> /admin
- Renames @medusajs/admin-sdk -> @medusajs/admin-bundler
- Creates a new package called @medusajs/admin-sdk that will hold all tooling relevant to creating admin extensions. This is currently `defineRouteConfig` and `defineWidgetConfig`, but will eventually also export methods for adding custom fields, register translation, etc.
- cc: @shahednasser we should update the examples in the docs so these functions are imported from `@medusajs/admin-sdk`. People will also need to install the package in their project, as it's no longer a transient dependency.
- cc: @olivermrbl we might want to publish a changelog when this is merged, as it is a breaking change, and will require people to import the `defineXConfig` from the new package instead of `@medusajs/admin-shared`.
- Updates CODEOWNERS so /admin packages does not require a review from the UI team.
