**What**
Currently, the dashboard is fetching way more data than needed to display the products. This can lead to issues for complex catalog. this pr aim to reduce the data to be fetched to exactly what is needed.
<img width="2553" alt="Screenshot 2025-02-19 at 15 08 16" src="https://github.com/user-attachments/assets/b00e856c-e040-4f05-9f15-41fb8d299387" />
**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.
