**What**
- fix `prepareConfirmInventory` to account for inventory kit items
- _note: this step is reused in the complete cart and all RMA flows_
- properly remove reservations for items that are removed from the order edit
- invalidate inventory/reservations cache when order edit is confirmed
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https://github.com/user-attachments/assets/f12e9198-0718-4c08-bd81-efc536eca146
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FIXES CC-565
**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.
