Explain keystrokes for each feature in the doc

[Zabrane]

@robertoaloi Would it be possible to add Emacs keystrokes for every feature described here?

I'm having trouble to find how to use these ones:

1. Signature Suggestions
2. Compiler Diagnostics
3. Edoc
4. Find/Peek References
5. Outline
6. Folding
7. Snippets
8. Suggest Type Specs

I checked Spacemacs's doc, but none of them were mentionned (specific to ErlangLS).

[robertoaloi]

Hi @Zabrane it sounds like a good idea to add editor-specific information in that page. It could look something like the debugger page where we use a tab for each editor. When it comes to Emacs I would probably focus on commands and not shortcuts, though, since every user probably has a different setup.
Consider that most of that content will have to come from the community, though, since I can only take care of the editor I use (mostly Emacs).

Transfering this issue to the documentation project, thanks for raising this!

[Zabrane]

@robertoaloi would be great. If you start with with Emacs and leave a message on the page asking for help, pretty sure the community will help with other editors IMHO.