Return a 404 when paring the route fails (#3860)

* return a 404 when paring the route fails

* add a playwright test for fullstack routing status codes

* Fix new playwright test

* document SSRError

* Make SSRError public and fix clippy

* Move the error display bound to the routable trait

* fix clippy

* return a more generic 404 message

* fix router tests

packages/router/src/lib.rs

@@ -39,7 +39,7 @@ mod contexts {
     pub(crate) mod router;
     pub use navigator::*;
     pub(crate) use router::*;
-    pub use router::{root_router, GenericRouterContext, RouterContext};
+    pub use router::{root_router, GenericRouterContext, ParseRouteError, RouterContext};
 }
 
 mod router_cfg;