Inline imports redivivus

[Daniel N]

On Saturday, 24 July 2021 at 18:13:32 UTC, Andrei Alexandrescu 
wrote:
> Per our coding standards I renamed `_import` to `import_` 
> although I find the latter awfully bizarre.

FWIW, I would prefer impmod or virtually any symbol without 
underscore, even though I generally try to avoid abbreviations in 
public symbols, it is not unheard of, ex AliasSeq, so I think 
it's the lesser of two evils in this case.

However, I'm happy as long as this feature finally works out of 
the box!

Thanks for driving this!