Convert Ctrl-Q source code from CommonJS to ESM / ECMAScript

[mountaindude]

The future is ECMAScript... Especially when looking at the various libraries used in Ctrl-Q, they are more and more migrating to ESM/ECMAScript.

The plan is to convert the source code to ESM and use that going forward.
When creating Ctrl-Q binaries esbuild will be used to create a single source code file in CJS format, as that's still needed to create binaries on top of Node.JS. That is expected to change sooner or later, then the ESM code should be usable also for creating binaries.