feat(next): reorder document view tabs (#12288)

Introduces the ability to customize the order of both default and custom
tabs. This way you can make custom tabs appear before default ones, or
change the order of tabs as you see fit.

To do this, use the new `tab.order` property in your edit view's config:

```ts
import type { CollectionConfig } from 'payload'

export const MyCollectionConfig: CollectionConfig = {
  // ...
  admin: {
    components: {
      views: {
        edit: {
          myCustomView: {
            path: '/my-custom-view',
            Component: '/path/to/component',
            tab: {
              href: '/my-custom-view',
              order: 100, // This will put this tab in the first position
            },
          }
        }
      }
    }
  }
}
```

---------

Co-authored-by: Jacob Fletcher <jacobsfletch@gmail.com>

docs/custom-components/document-views.mdx

@@ -123,6 +123,7 @@ export const MyCollection: CollectionConfig = {
             tab: {
               label: 'Another Custom View',
               href: '/another-custom-view',
+              order: '100',
             },
             // highlight-end
           },
@@ -143,6 +144,7 @@ The following options are available for tabs:
 | ----------- | ------------------------------------------------------------------------------------------------------------- |
 | `label`     | The label to display in the tab.                                                                              |
 | `href`      | The URL to navigate to when the tab is clicked. This is optional and defaults to the tab's `path`.            |
+| `order`     | The order in which the tab appears in the navigation. Can be set on default and custom tabs.                  |
 | `Component` | The component to render in the tab. This can be a Server or Client component. [More details](#tab-components) |
 
 ### Tab Components