Add dashboard to build

reminder-dashboard/src/components/Reminder/Username.tsx

@@ -0,0 +1,24 @@
+import { useReminder } from "./ReminderContext";
+
+export const Username = () => {
+    const [reminder, setReminder] = useReminder();
+
+    return (
+        <div class="discord-message-header">
+            <label class="is-sr-only">Username Override</label>
+            <input
+                class="discord-username message-input"
+                placeholder="Username Override"
+                maxlength={32}
+                name="username"
+                value={reminder.username || "Reminder"}
+                onBlur={(ev) => {
+                    setReminder((reminder) => ({
+                        ...reminder,
+                        username: ev.currentTarget.value,
+                    }));
+                }}
+            ></input>
+        </div>
+    );
+};