gpui: Implement `From<String>` for ElementId (#44447)

Release Notes:

- N/A

## Before

```rs
div()
    .id(SharedString::from(format!("process-entry-{ix}-command")))
```

## After

```rs
div()
    .id(format!("process-entry-{ix}-command"))
```
4e75f0f3abJason Lee committed on 12/9/2025, 8:08:59 AM· committed by GitHubparent0b4f72e
18 files changedLine totals unavailable