Less clumsy configuration for desktop and mobile (#553)

* chore: dont use prebuilt builder pattern for configuring desktop

* chore: use regular config pattern for web

* Chore: update docs too

* chore: clean up some warnings

docs/guide/examples/hooks_bad.rs

@@ -55,7 +55,7 @@ fn App(cx: Scope) -> Element {
     }
 
     // ✅ Instead, use a hashmap with use_ref
-    let selection_map = use_ref(&cx, || HashMap::<&str, bool>::new());
+    let selection_map = use_ref(&cx, HashMap::<&str, bool>::new);
 
     for name in &names {
         let is_selected = selection_map.read()[name];