feat: add direct templates links (#1165)

## Description

Direct templates links is a feature that provides template owners the
ability to allow users to create documents based of their templates.

## General outline

This works by allowing the template owner to configure a "direct
recipient" in the template.

When a user opens the direct link to the template, it will create a flow
where they sign the fields configured by the template owner for the
direct recipient. After these fields are signed the following will
occur:

- A document will be created where the owner is the template owner
- The direct recipient fields will be signed
- The document will be sent to any other recipients configured in the
template
- If there are none the document will be immediately completed

## Notes

There's a custom prisma migration to migrate all documents to have
'DOCUMENT' as the source, then sets the column to required.

---------

Co-authored-by: Lucas Smith <me@lucasjamessmith.me>

packages/lib/server-only/template/create-document-from-template-legacy.ts

@@ -1,6 +1,6 @@
 import { nanoid } from '@documenso/lib/universal/id';
 import { prisma } from '@documenso/prisma';
-import type { RecipientRole } from '@documenso/prisma/client';
+import { DocumentSource, type RecipientRole } from '@documenso/prisma/client';
 
 export type CreateDocumentFromTemplateLegacyOptions = {
   templateId: number;
@@ -62,6 +62,8 @@ export const createDocumentFromTemplateLegacy = async ({
 
   const document = await prisma.document.create({
     data: {
+      source: DocumentSource.TEMPLATE,
+      templateId: template.id,
       userId,
       teamId: template.teamId,
       title: template.title,