Added Better Auth

env.d.ts

@@ -0,0 +1,9 @@
+/// <reference path="./.astro/types.d.ts" />
+/// <reference types="astro/client" />
+
+declare namespace App {
+  interface Locals {
+    user: import("better-auth").User | null;
+    session: import("better-auth").Session | null;
+  }
+}