feat: allow editing pending documents (#1346)

## Description

Adds the ability for the document owner to edit recipients and their
fields after the document has been sent.

A recipient can only be updated or deleted if:
- The recipient has not inserted any fields
- Has not completed the document

<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit

## Release Notes

- **New Features**
- Added new localization messages to clarify user actions regarding
document signing.
  - Enhanced French translations for improved user interaction.

- **Improvements**
- Updated localization strings in German and English for clearer
feedback on signer and recipient statuses.
- Improved overall structure of localization files for better
maintainability.

- **Dependency Updates**
- Upgraded `next-axiom` and `remeda` libraries to their latest versions,
potentially enhancing performance and stability.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->

---------

Co-authored-by: Mythie <me@lucasjamessmith.me>

packages/lib/utils/recipients.ts

@@ -0,0 +1,33 @@
+import { type Field, type Recipient, RecipientRole, SigningStatus } from '@documenso/prisma/client';
+
+/**
+ * Whether a recipient can be modified by the document owner.
+ */
+export const canRecipientBeModified = (recipient: Recipient, fields: Field[]) => {
+  // Deny if the recipient has already signed the document.
+  if (!recipient || recipient.signingStatus === SigningStatus.SIGNED) {
+    return false;
+  }
+
+  // Deny if the recipient has inserted any fields.
+  if (fields.some((field) => field.recipientId === recipient.id && field.inserted)) {
+    return false;
+  }
+
+  return true;
+};
+
+/**
+ * Whether a recipient can have their fields modified by the document owner.
+ *
+ * A recipient can their fields modified if all the conditions are met:
+ * - They are not a Viewer or CCer
+ * - They can be modified (canRecipientBeModified)
+ */
+export const canRecipientFieldsBeModified = (recipient: Recipient, fields: Field[]) => {
+  if (!canRecipientBeModified(recipient, fields)) {
+    return false;
+  }
+
+  return recipient.role !== RecipientRole.VIEWER && recipient.role !== RecipientRole.CC;
+};