feat: payload admin bar (#3684)

Imports https://github.com/payloadcms/payload-admin-bar into the Payload
monorepo. This package will now be regularly maintained directly
alongside all Payload packages and now includes its own test suite.

A few changes minor have been made between v1.0.7 and latest:

1. The package name has changed from `payload-admin-bar` to
`@payloadcms/admin-bar`.

    ```diff
    - import { PayloadAdminBar } from 'payload-admin-bar'
    + import { PayloadAdminBar } from '@payloadcms/admin-bar'
    ```
2. The `collection` prop has been renamed to `collectionSlug`
3. The `authCollection` prop has been renamed to `authCollectionSlug`

Here's a screenshot of the admin bar in use within the Website Template:

<img width="1057" alt="Screenshot 2025-03-05 at 1 20 04 PM"
src="https://github.com/user-attachments/assets/2597a8fd-da75-4b2f-8979-4fc8132999e8"
/>

---------

Co-authored-by: Kalon Robson <kalon.robson@outlook.com>

test/tsconfig.typecheck.json

@@ -12,6 +12,9 @@
     // "../packages/**/src/**/*.tsx"
   ],
   "references": [
+    {
+      "path": "../packages/admin-bar"
+    },
     {
       "path": "../packages/create-payload-app"
     },