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/recoil/examples/ecs.rs

@@ -31,7 +31,7 @@ const TODOS: EcsModel<u32, TodoModel> = |builder| {};
 // const SELECT_TITLE: SelectorBorrowed<u32, &str> = |s, k| TODOS.field(0).select(k);
 // const SELECT_SUBTITLE: SelectorBorrowed<u32, &str> = |s, k| TODOS.field(1).select(k);
 
-static App: FC<()> = |ctx, _| {
+static App: FC<()> = |ctx| {
     use_init_recoil_root(ctx, |_| {});
 
     // let title = use_recoil_value(ctx, &C_SELECTOR);