feat(app): added better auth for better auth stuff vs my home written broken one

app/src/pkg/auth/auth-client.ts

@@ -0,0 +1,19 @@
+import { createAuthClient } from "better-auth/client";
+
+import {
+    inferAdditionalFields,
+    usernameClient,
+    adminClient,
+    apiKeyClient,
+} from "better-auth/client/plugins";
+import type { auth } from "./auth.js";
+
+export const authClient = createAuthClient({
+    baseURL: "http://localhost:3000",
+    plugins: [
+        inferAdditionalFields<typeof auth>(),
+        usernameClient(),
+        adminClient(),
+        apiKeyClient(),
+    ],
+});