feat: use server-actions for authoring flow

This change actually makes the authoring flow work for
the most part by tying in emailing and more.

We have also done a number of quality of life updates to
simplify the codebase overall making it easier to continue
work on the refresh.

apps/web/src/components/forms/edit-document/add-subject.action.ts

@@ -0,0 +1,21 @@
+'use server';
+
+import { getRequiredServerComponentSession } from '@documenso/lib/next-auth/get-server-session';
+import { sendDocument } from '@documenso/lib/server-only/document/send-document';
+
+import { TAddSubjectFormSchema } from './add-subject.types';
+
+export type CompleteDocumentActionInput = TAddSubjectFormSchema & {
+  documentId: number;
+};
+
+export const completeDocument = async ({ documentId }: CompleteDocumentActionInput) => {
+  'use server';
+
+  const { id: userId } = await getRequiredServerComponentSession();
+
+  await sendDocument({
+    userId,
+    documentId,
+  });
+};