feat: bulk upload (#7800)

## Description

Adds bulk upload functionality to upload enabled configs.

You can disable the ability by defining `upload.bulkUpload: false` in
your upload enabled config.

- [x] I have read and understand the
[CONTRIBUTING.md](https://github.com/payloadcms/payload/blob/main/CONTRIBUTING.md)
document in this repository.

## Type of change

- [x] New feature (non-breaking change which adds functionality)

## Checklist:

- [ ] I have added tests that prove my fix is effective or that my
feature works
- [ ] Existing test suite passes locally with my changes
- [ ] I have made corresponding changes to the documentation

packages/payload/src/collections/config/sanitize.ts

@@ -120,6 +120,7 @@ export const sanitizeCollection = async (
     // disable duplicate for uploads by default
     sanitized.disableDuplicate = sanitized.disableDuplicate || true
 
+    sanitized.upload.bulkUpload = sanitized.upload?.bulkUpload ?? true
     sanitized.upload.staticDir = sanitized.upload.staticDir || sanitized.slug
     sanitized.admin.useAsTitle =
       sanitized.admin.useAsTitle && sanitized.admin.useAsTitle !== 'id'

packages/payload/src/uploads/types.ts

@@ -95,6 +95,11 @@ export type UploadConfig = {
    * - A function that generates a fully qualified URL for the thumbnail, receives the doc as the only argument.
    **/
   adminThumbnail?: GetAdminThumbnail | string
+  /**
+   * Enables bulk upload of files from the list view.
+   * @default true
+   */
+  bulkUpload?: boolean
   /**
    * Enables cropping of images.
    * @default true