Deprecate {} without () for function pointers and delegates

[Mindy (0xEAB)]

On Friday, 12 June 2026 at 21:07:49 UTC, ABrightLight wrote:
> It's generally been agreed on in the past that {} without () in 
> lambdas causes ambiguity with block statements.

I would have posted this to `digitalmars.dip.ideas`.