First Draft: Member of Operator

[Dukc]

On Wednesday, 11 September 2024 at 11:08:18 UTC, Richard (Rikki) 
Andrew Cattermole wrote:
> The member of operator is a unified method for acquiring a 
> member
> of a context.
>
> [snip]

I like this as a whole.

However, I'm unsure if prefix `:` is the best choice for implicit 
context operator. I can't immediately say no, but would like to 
see a bit of discussion whether there are better alternatives.