feat: implement type magic to allow strings, format args, and other types directly in rsx (#550)

* feat: implement type magic

* chore: undo example

* fix: let tests pass

* chore: add generic to allow any nesting of iterators

* Chore: remove comments

* chore: update rsx usage

* chore: use cleaner version of generic IntoVnode

* chore: don't derive default for lfietimed thing

* chore: remove latent comment

* fix: accept a third parameter

examples/rsx_usage.rs

@@ -203,8 +203,8 @@ fn app(cx: Scope) -> Element {
             self::lowercase_helper {}
 
             // helper functions
-            // Single values must be wrapped in braces or `Some` to satisfy `IntoIterator`
-            [helper(&cx, "hello world!")]
+            // Anything that implements IntoVnode can be dropped directly into Rsx
+            helper(&cx, "hello world!")
         }
     })
 }

examples/simple_list.rs

@@ -0,0 +1,19 @@
+use dioxus::prelude::*;
+
+fn main() {
+    dioxus_desktop::launch(app);
+}
+
+fn app(cx: Scope) -> Element {
+    cx.render(rsx!(
+        // Use Map directly to lazily pull elements
+        (0..10).map(|f| rsx! { "{f}" }),
+        // Collect into an intermediate collection if necessary
+        ["a", "b", "c"]
+            .into_iter()
+            .map(|f| rsx! { "{f}" })
+            .collect::<Vec<_>>(),
+        // Use optionals
+        Some(rsx! { "Some" }),
+    ))
+}