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.

packages/core/examples/macrosrc.rs

@@ -90,7 +90,7 @@ fn main() {}
 //         div(bump)
 //             .attr("class", "edit")
 //             .child(text("Hello"))
-//             .child(text(ctx.props.text.as_ref()))
+//             .child(text(ctx.ctx.text.as_ref()))
 //             .finish()
 //     })
 // }
@@ -123,7 +123,7 @@ fn main() {}
 //             _ => html! { <div> </div> },
 //         };
 
-//         if ctx.props.blah {
+//         if ctx.ctx.blah {
 //             html! { <div> </div> }
 //         } else {
 //             tex