Code Completion: Prioritize suggestions

[obiwan87]

TODO:

• Prioritize suggestions that respect the type constraints of the suggestion context
• When using core/base/vendor-packages, prioritize symbols based on statistical relevance (scrape Odin github projects)

[Dima-369]

When using core/base/vendor-packages, prioritize symbols based on statistical relevance (scrape Odin github projects)

I wouldn't scrape. Every project probably has other prioritization depending on the context. It would be fine if the completions work on frequency. So, if I pick foo, it appears at the top (or near the top) the next time in the completion popups, and so on.

That way, every project (or globally) builds up this completion suggestion list depending on what the user really needs.