WIP: start on editor element

crates/gpui2/src/geometry.rs

@@ -825,6 +825,12 @@ impl From<Pixels> for u32 {
     }
 }
 
+impl From<u32> for Pixels {
+    fn from(pixels: u32) -> Self {
+        Pixels(pixels as f32)
+    }
+}
+
 impl From<Pixels> for usize {
     fn from(pixels: Pixels) -> Self {
         pixels.0 as usize