feat: create impromptu demo page

src/components/row.rs

@@ -1,9 +1,7 @@
 use leptos::prelude::*;
 
 #[component]
-pub fn Row(
-    children: Children
-) -> impl IntoView {
+pub fn Row(children: Children) -> impl IntoView {
     view! {
         <div class="flex flex-row gap-2 flex-1">
             {children()}