Fix handling of uppercase characters in fuzzy finding

zed/src/worktree/char_bag.rs

@@ -1,3 +1,5 @@
+use std::iter::FromIterator;
+
 #[derive(Copy, Clone, Debug, Default)]
 pub struct CharBag(u64);
 
@@ -31,6 +33,14 @@ impl Extend<char> for CharBag {
     }
 }
 
+impl FromIterator<char> for CharBag {
+    fn from_iter<T: IntoIterator<Item = char>>(iter: T) -> Self {
+        let mut result = Self::default();
+        result.extend(iter);
+        result
+    }
+}
+
 impl From<&str> for CharBag {
     fn from(s: &str) -> Self {
         let mut bag = Self(0);