feat: update project configuration and dependencies

- Set "type" to "module" in package.json for ES module support.
- Change development script to use "tsx" for better TypeScript support.
- Upgrade devDependencies to latest versions for improved performance and compatibility.
- Update dotenv dependency to version 17.0.1.
- Modify tsconfig.json to target ES2022 and use NodeNext module resolution.
- Add top-level await example in src/index.ts for demonstration.

Author: austenstone