⭐ feat(infra): Migrate to serverless Lambda architecture (#291)

## Description
<!-- Briefly describe the purpose and scope of your changes -->


<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->

## Summary by CodeRabbit

- **New Features**
- Introduced serverless API and authentication endpoints, improving
scalability and reliability.
- Added rate limiting to the API, providing protection against excessive
requests and returning custom error responses.

- **Improvements**
- Simplified infrastructure for both API and authentication, reducing
complexity and improving maintainability.
- Updated resource allocations for backend services to optimize
performance and cost.

- **Bug Fixes**
- Removed unused scripts and configuration, resulting in a cleaner
development environment.

- **Other**
  - Updated type declarations to reflect new infrastructure changes.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

packages/functions/package.json

@@ -7,10 +7,6 @@
     "@types/bun": "latest",
     "@types/steamcommunity": "^3.43.8"
   },
-  "scripts": {
-    "dev:auth": "bun run --watch ./src/auth/index.ts",
-    "dev:api": "bun run --watch ./src/api/index.ts"
-  },
   "peerDependencies": {
     "typescript": "^5"
   },