Feat: massive changes to definition of components

This change switches back to the original `ctx<props>` syntax for
commponents. This lets lifetime elision to remove the need to match
exactly which lifetime (props or ctx) gets  carried to the output. As
such, `Props` is currently required to be static. It *is* possible to
loosen this restriction, and will be done in the future, though only
through adding metadata about the props through the Props derive
macro. Implementing the IS_STATIC trait is unsafe, so the derive macro
will do it through some heuristics.

For now, this unlocks sharing vnodes from parents to children, enabling
pass-thru components, fragments, portals, etc.

examples/router.rs

@@ -12,7 +12,7 @@ fn main() {
     diouxs_webview::launch(App).run().await
 }
 
-fn App(ctx: Context, props: &()) -> DomTree {
+fn App(ctx: Context<()>) -> VNode {
     let router = use_router(&ctx, |router| {
         //
         router.get("/dogs/:dogId/").render(|ctx, request| {