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/api/locations/route.ts

@@ -1,5 +1,5 @@
 import { NextRequest, NextResponse } from "next/server";
-import type { LocationResponse } from "@/types/location";
+import type { LocationResponse } from "@/lib/types";
 import { locationDb, Location, deviceDb, userDb } from "@/lib/db";
 import { auth } from "@/lib/auth";