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/core/examples/borrowed.rs

@@ -63,10 +63,12 @@ impl PartialEq for ChildProps {
         false
     }
 }
-unsafe impl Properties for ChildProps {
+impl Properties for ChildProps {
     type Builder = ();
-    const CAN_BE_MEMOIZED: bool = false;
     fn builder() -> Self::Builder {
         ()
     }
+    unsafe fn memoize(&self, other: &Self) -> bool {
+        self == other
+    }
 }