First Draft: ref For Variable Declarations

[Walter Bright]

On 4/12/2024 1:43 PM, Walter Bright wrote:
> https://github.com/WalterBright/documents/blob/984374ca885e1cb10c2667cf872aebc13b4c1663/varRef.md

Implementation:

https://github.com/dlang/dmd/pull/16428