refactor: switch from tsc to tsup for building

- Install and configure tsup for better ESM build support
- Update build scripts to use tsup instead of tsc
- Configure tsup to preserve directory structure (bundle: false)
- Convert wait-for-elasticsearch.js script to ESM
- Update test to check ESM compatibility instead of CommonJS
- Fix test service.options type casting
- Increase timeout for before/after hooks in tests

Author: marshallswain