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/get-template-by-direct-link-token.ts

@@ -0,0 +1,33 @@
+import { prisma } from '@documenso/prisma';
+
+export interface GetTemplateByDirectLinkTokenOptions {
+  token: string;
+}
+
+export const getTemplateByDirectLinkToken = async ({
+  token,
+}: GetTemplateByDirectLinkTokenOptions) => {
+  const template = await prisma.template.findFirstOrThrow({
+    where: {
+      directLink: {
+        token,
+        enabled: true,
+      },
+    },
+    include: {
+      directLink: true,
+      Recipient: {
+        include: {
+          Field: true,
+        },
+      },
+      templateDocumentData: true,
+      templateMeta: true,
+    },
+  });
+
+  return {
+    ...template,
+    Field: template.Recipient.map((recipient) => recipient.Field).flat(),
+  };
+};