Support for showing source code

[vemv]

Hi!

It would be useful to show the source code of a given function for a few use cases:

• As a standalone function, e.g. M-x tide-source-at-point
  • this would be akin to VS Code peek definition
• As a drop-in fallback for M-x tide-documentation-at-point
  • e.g. if there's no available doc, show the source code instead – it often is useful enough as "documentation"
  • a variation: always append the source at the end of the buffer, even if the documentation was present
  • it would be good to apply font locking here.
• As the *tide-documentation* buffer when using Company completions
  • this is essentially the same use case as the previous one, but in the context of showing doc while choosing a Company candidate.

Note that, AFAIK, tide-completion-show-source has nothing to do with this feature - that one merely renders a file path, not the source code itself.

Cheers - V

[vemv]

I'm willing to pay a small but honorable fixed amount for this feature (via GH Sponsors), especially if you are a regular contributor to this project.