gpui: Fix img element to render correct SVG color (#15488)

Release Notes:

- N/A


It should convert RGBA to BGRA.

> I added an example color svg, that was I make based on [Lucide grip
icon](https://lucide.dev/icons/grip).

## Before

<img width="692" alt="image"
src="https://github.com/user-attachments/assets/5eb03606-76ce-4049-b3ad-8d1084a4fa55">


## After

<img width="695" alt="image"
src="https://github.com/user-attachments/assets/650dd411-2095-4e92-b3fd-8e91c6954aa3">

Co-authored-by: Marshall Bowers <elliott.codes@gmail.com>

crates/gpui/src/elements/img.rs

@@ -408,9 +408,14 @@ impl Asset for ImageAsset {
                     // TODO: Can we make svgs always rescale?
                     svg_renderer.render_pixmap(&bytes, SvgSize::ScaleFactor(1.0))?;
 
-                let buffer =
+                let mut buffer =
                     ImageBuffer::from_raw(pixmap.width(), pixmap.height(), pixmap.take()).unwrap();
 
+                // Convert from RGBA to BGRA.
+                for pixel in buffer.chunks_exact_mut(4) {
+                    pixel.swap(0, 2);
+                }
+
                 RenderImage::new(SmallVec::from_elem(Frame::new(buffer), 1))
             };