feat: add width setter

widget/src/text_editor.rs

@@ -109,6 +109,12 @@ where
         self
     }
 
+    /// Sets the width of the [`TextEditor`].
+    pub fn width(mut self, width: impl Into<Length>) -> Self {
+        self.width = width.into();
+        self
+    }
+
     /// Sets the message that should be produced when some action is performed in
     /// the [`TextEditor`].
     ///