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/prisma/seed/initial-seed.ts

@@ -4,7 +4,7 @@ import path from 'node:path';
 import { hashSync } from '@documenso/lib/server-only/auth/hash';
 
 import { prisma } from '..';
-import { DocumentDataType, Role } from '../client';
+import { DocumentDataType, DocumentSource, Role } from '../client';
 
 export const seedDatabase = async () => {
   const examplePdf = fs
@@ -54,6 +54,7 @@ export const seedDatabase = async () => {
 
   await prisma.document.create({
     data: {
+      source: DocumentSource.DOCUMENT,
       title: 'Example Document',
       documentDataId: examplePdfData.id,
       userId: exampleUser.id,