feat: props memoization is more powerful

This commit solves the memoization , properly memoizing properties that don't have any generic parameters. This is a rough heuristic to prevent non-static lifetimes from creeping into props and breaking our minual lifetime management.

Props that have a generic parameter are opted-out of the `partialeq` requirement and props *without* lifetimes must implement partialeq. We're going to leave manual disabling of memoization for future work.

packages/web/examples/props.rs

@@ -0,0 +1,13 @@
+use dioxus_core as dioxus;
+use dioxus_core::prelude::*;
+
+#[derive(Props)]
+struct MyProps<'a> {
+    blah: u128,
+    b: &'a (),
+}
+
+fn main() {
+    // let p = unsafe { MyProps {}.memoize(&MyProps {}) };
+    // dbg!(p);
+}