feat(method): add get_component() method

This method let get Box whose children are a label and a TextView/Entry

src/view/components/input.rs

@@ -71,6 +71,8 @@ impl<I> Product<InputBuilder, Box> for Input<I> {
 }
 
 impl<I> Input<I> {
+    pub fn get_component(&self) -> &Box {
+        &self.component
     }
 
     pub fn get_input(&self) -> &I {