Outline view and completions for Enso code in VSCode.
# Important Notes
This PR provides the necessary infrastructure for building VSCode extension that includes `enso_parser` library compiled for all supported platforms.
VSCode extension can now use libraries from `sbt` that are `publishM2`-ready. To make that possible a documentation must have been provided and fixed for those modules - hence so many changes in `.scala` classes.
<img width="862" alt="image" src="https://github.com/enso-org/enso/assets/26887752/7374bf41-bdc6-4322-b562-85a2e761de2a">
Last, but not least. The outline view and completions display something.
