feat: signing order (#1290)

Adds the ability to specify an optional signing order for documents.
When specified a document will be considered sequential with recipients
only being allowed to sign in the order that they were specified in.

apps/web/src/app/embed/base-schema.ts

@@ -1,5 +1,8 @@
 import { z } from 'zod';
 
 export const ZBaseEmbedDataSchema = z.object({
-  css: z.string().optional().transform(value => value || undefined),
+  css: z
+    .string()
+    .optional()
+    .transform((value) => value || undefined),
 });