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/src/diff.rs

@@ -65,22 +65,22 @@ pub struct DiffMachine<'a> {
 }
 pub enum LifeCycleEvent<'a> {
     Mount {
-        caller: Weak<dyn for<'r> Fn(Context<'r>) -> DomTree + 'a>,
+        caller: Weak<dyn Fn(&Scope) -> VNode + 'a>,
         stable_scope_addr: Weak<VCompAssociatedScope>,
         root_id: u32,
     },
     PropsChanged {
-        caller: Weak<dyn for<'r> Fn(Context<'r>) -> DomTree + 'a>,
+        caller: Weak<dyn Fn(&Scope) -> VNode + 'a>,
         stable_scope_addr: Weak<VCompAssociatedScope>,
         root_id: u32,
     },
     SameProps {
-        caller: Weak<dyn for<'r> Fn(Context<'r>) -> DomTree + 'a>,
+        caller: Weak<dyn Fn(&Scope) -> VNode + 'a>,
         stable_scope_addr: Weak<VCompAssociatedScope>,
         root_id: u32,
     },
     Replace {
-        caller: Weak<dyn for<'r> Fn(Context<'r>) -> DomTree + 'a>,
+        caller: Weak<dyn Fn(&Scope) -> VNode + 'a>,
         old_scope: Weak<VCompAssociatedScope>,
         new_scope: Weak<VCompAssociatedScope>,
         root_id: u32,