Using ESM so the `import` syntax we use is actually valid without compilation. Now, Node can run the TypeScript code directly, albeit without typechecking and requiring use of an experimental feature.
Reviewed-on: OpenWF/SpaceNinjaServer#2696
Co-authored-by: Sainan <63328889+Sainan@users.noreply.github.com>
Co-committed-by: Sainan <63328889+Sainan@users.noreply.github.com>
