First Draft: ref For Variable Declarations

[Richard (Rikki) Andrew Cattermole]

On 02/05/2024 6:58 PM, Walter Bright wrote:
> I forgot to mention: ref's are not rebindable:

And this is why we should expand upon alias instead.

```d
int adder(int a, int b) {
	alias Perform = a + b;
	return Perform;
}
```

This is far more expected as a feature (I have tried to do simple 
aliasing of variables with it in the past).

It basically offers lazy expression inlining.

Which could be quite cool.