feat: signature rejection (#1472)

## Description

Adds support for rejecting a given document informing the document
owner.

Flows for resolving a rejection don't currently exist so it's up to the
document owner to reach out to the recipient and work out a way to move
forward via a new document or offline agreement.

## Related Issue


## Changes Made

- Added new rejection properties to the recipient schema
- Added API endpoints to support rejection
- Added email templates for notifying the document owner and recipient
- Added a dialog on the signing page to start the rejection flow.

## Testing Performed

- Manually tested the flow end to end
- Automated tests are planned

packages/lib/client-only/recipient-type.ts

@@ -6,6 +6,7 @@ export enum RecipientStatusType {
   OPENED = 'opened',
   WAITING = 'waiting',
   UNSIGNED = 'unsigned',
+  REJECTED = 'rejected',
 }
 
 export const getRecipientType = (recipient: Recipient) => {
@@ -16,6 +17,10 @@ export const getRecipientType = (recipient: Recipient) => {
     return RecipientStatusType.COMPLETED;
   }
 
+  if (recipient.signingStatus === SigningStatus.REJECTED) {
+    return RecipientStatusType.REJECTED;
+  }
+
   if (
     recipient.sendStatus === SendStatus.SENT &&
     recipient.readStatus === ReadStatus.OPENED &&