third draft: add bitfields to D

[Dave P.]

On Sunday, 5 May 2024 at 23:08:29 UTC, Walter Bright wrote:
> https://github.com/WalterBright/documents/blob/2ec9c5966dccc423a2c4c736a6783d77c255403a/bitfields.md
>
> Adds introspection capabilities.
>
> https://github.com/dlang/dmd/pull/16444

Is it possible to make `bool` bitfields portable? Most of the 
time I want to use bitfields in C is to optimize boolean fields.