Move types to lib directory for better organization

- Move types/location.ts to lib/types.ts
- Update all imports from @/types/location to @/lib/types
- Remove empty types/ directory
- Better aligns with Next.js conventions

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

app/admin/page.tsx

@@ -2,7 +2,7 @@
 
 import { useEffect, useState } from "react";
 import { useSession } from "next-auth/react";
-import { LocationResponse } from "@/types/location";
+import { LocationResponse } from "@/lib/types";
 
 interface DeviceInfo {
   id: string;