feat: bulk send templates via csv (#1578)

Implements a bulk send feature allowing users to upload a CSV file to
create multiple documents from a template. Includes CSV template
generation, background processing, and email notifications.

<img width="563" alt="image"
src="https://github.com/user-attachments/assets/658cee71-6508-4a00-87da-b17c6762b7d8"
/>
<img width="578" alt="image"
src="https://github.com/user-attachments/assets/bbfac70b-c6a0-466a-be98-99ca4c4eb1b9"
/>
<img width="635" alt="image"
src="https://github.com/user-attachments/assets/65b2f55d-d491-45ac-84d6-1a31afe953dd"
/>


## Changes Made

- Added `TemplateBulkSendDialog` with CSV upload/download functionality
- Implemented bulk send job handler using background task system
- Created email template for completion notifications
- Added bulk send option to template view and actions dropdown
- Added CSV parsing with email/name validation

## Testing Performed

- CSV upload with valid/invalid data
- Bulk send with/without immediate sending
- Email notifications and error handling
- Team context integration
- File size and row count limits

Resolves #1550

apps/web/src/app/(dashboard)/templates/[id]/template-page-view.tsx

@@ -14,6 +14,7 @@ import { LazyPDFViewer } from '@documenso/ui/primitives/lazy-pdf-viewer';
 
 import { DocumentReadOnlyFields } from '~/components/document/document-read-only-fields';
 import { TemplateType } from '~/components/formatter/template-type';
+import { TemplateBulkSendDialog } from '~/components/templates/template-bulk-send-dialog';
 
 import { DataTableActionDropdown } from '../data-table-action-dropdown';
 import { TemplateDirectLinkBadge } from '../template-direct-link-badge';
@@ -111,6 +112,8 @@ export const TemplatePageView = async ({ params, team }: TemplatePageViewProps)
         <div className="mt-2 flex flex-row space-x-4 sm:mt-0 sm:self-end">
           <TemplateDirectLinkDialogWrapper template={template} />
 
+          <TemplateBulkSendDialog templateId={template.id} recipients={template.recipients} />
+
           <Button className="w-full" asChild>
             <Link href={`${templateRootPath}/${template.id}/edit`}>
               <LucideEdit className="mr-1.5 h-3.5 w-3.5" />