Feat: revert FC changes (like the old style).

This commit reverts to the old style of props + FC. The old style is desirable
because people comfortable with react can automatically be comfortable with
dioxus. It's also nice in that the same props can be used to drive two different
components - something the trait version couldn't do. Now, our trait bound forces
implementations to have the #[derive(Props)] flag. This will need to implement the
Properties trait as well as PartialEq (using ptr::equal for closure fields).

packages/core/examples/props.rs

@@ -1,32 +1,20 @@
-use std::marker::PhantomData;
+use dioxus_core_macro::Props;
 
-fn main() {}
+#[derive(Debug, Props)]
+struct SomeProps {
+    a: i32,
 
-trait Props<'parent> {}
-
-struct SomeProps<'p> {
-    text: &'p str,
+    // automatically do the default (none) and automatically Into<T>
+    #[builder(default, setter(strip_option))]
+    b: Option<i32>,
 }
 
-impl<'p> Props<'p> for SomeProps<'p> {}
+// have we committed to the trait style yet?
 
-struct OutputNode<'a> {
-    _p: PhantomData<&'a ()>,
+fn main() {
+    let g: SomeProps = SomeProps::builder().a(10).b(10).build();
+
+    let r = g.b.unwrap_or_else(|| 10);
 }
 
-// combine reference to self (borrowed from self) and referenfce to parent (borrowed from parent)
-// borrow chain looks like 'p + 's -> 'p + 's -> 'p + 's
-// always adding new lifetimes from self into the mix
-// what does a "self" lifetime mean?
-// a "god" gives us our data
-// the god's lifetime is tied to Context, and the borrowed props object
-// for the sake of simplicity, we just clobber lifetimes.
-// user functions are just lies and we abuse lifetimes.
-// everything is managed at runtime because that's how we make something ergonomc
-// lifetime management in dioxus is just cheating around the rules
-// our kind god manages lifetimes for us so we don't have to, thanks god
-fn something<'s>(_props: &'s SomeProps<'s>) -> OutputNode<'s> {
-    todo!()
-}
-
-// type BC<'p, P: Props<'p>> = for<'a, 'b, 'c> fn(&'a P<'b>) -> OutputNode<'c>;
+fn auto_into_some() {}