Add __traits(canCall) and __traits(resolve)

[Steven Schveighoffer]

On Saturday, 26 July 2025 at 02:27:08 UTC, Steven Schveighoffer 
wrote:
> ## `__traits(resolve, expression)`

Although we came up with it independently, I have to give credit 
to Paul Backus to coming up with this first!

Now I know I got the right idea ;) And even the name matches!

https://forum.dlang.org/post/atjkxxmugmfbsntvwgpi@forum.dlang.org

-Steve