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/errors/app-error.ts

@@ -12,6 +12,7 @@ export enum AppErrorCode {
   'EXPIRED_CODE' = 'ExpiredCode',
   'INVALID_BODY' = 'InvalidBody',
   'INVALID_REQUEST' = 'InvalidRequest',
+  'LIMIT_EXCEEDED' = 'LimitExceeded',
   'NOT_FOUND' = 'NotFound',
   'NOT_SETUP' = 'NotSetup',
   'UNAUTHORIZED' = 'Unauthorized',