Please improve the with statement by allowing initialisation

[Dejan Lekic]

On Wednesday, 12 March 2025 at 18:55:45 UTC, Dejan Lekic wrote:
> the with block. Since with statement does not allow 
> initialisation one would try:

As usual, I forgot to give an example of what I am actually 
asking for...

```d
auto app = new Application();
with (auto win = new Window) { // currently not allowed
   setTitle("Example");
   setDefaultSize(200, 200);
   setChild(mainBox);
   app.addWindow(win);
}
```