Add disabled state and on_toggle handler to Toggler

Co-authored-by: Your Name here only <krishnsundaram@gmail.com>

widget/src/helpers.rs

@@ -769,13 +769,12 @@ where
 pub fn toggler<'a, Message, Theme, Renderer>(
     label: Option<impl text::IntoFragment<'a>>,
     is_checked: bool,
-    f: impl Fn(bool) -> Message + 'a,
 ) -> Toggler<'a, Message, Theme, Renderer>
 where
     Theme: toggler::Catalog + 'a,
     Renderer: core::text::Renderer,
 {
-    Toggler::new(label, is_checked, f)
+    Toggler::new(label, is_checked)
 }
 
 /// Creates a new [`TextInput`].