Merge branch 'gpui2' into marshall/gpui2-playground

crates/util/src/arc_cow.rs

@@ -1,4 +1,5 @@
 use std::{
+    borrow::Cow,
     fmt::{self, Debug},
     sync::Arc,
 };
@@ -47,6 +48,15 @@ impl From<String> for ArcCow<'_, str> {
     }
 }
 
+impl<'a> From<Cow<'a, str>> for ArcCow<'a, str> {
+    fn from(value: Cow<'a, str>) -> Self {
+        match value {
+            Cow::Borrowed(borrowed) => Self::Borrowed(borrowed),
+            Cow::Owned(owned) => Self::Owned(owned.into()),
+        }
+    }
+}
+
 impl<'a, T: ?Sized + ToOwned> std::borrow::Borrow<T> for ArcCow<'a, T> {
     fn borrow(&self) -> &T {
         match self {