feat: add trpc route to send emails

apps/web/src/app/send/page.tsx

@@ -0,0 +1,24 @@
+'use client';
+
+import React from 'react';
+
+import { trpc } from '@documenso/trpc/react';
+
+export default function Send() {
+  const { mutateAsync: sendMail } = trpc.document.sendEmail.useMutation();
+
+  return (
+    <div className="p-20">
+      <button
+        className="rounded-md border-2 border-solid border-black px-4 py-2 text-2xl"
+        onClick={async () => {
+          console.log('clicked');
+
+          await sendMail({ email: 'duncan@documenso.com' });
+        }}
+      >
+        Send
+      </button>
+    </div>
+  );
+}