Fix dioxus-fullstack::Streaming<T,E> only deserializing one client value (#4975)

* dioxus-fullstack::Streaming: decode multiple client values from Bytes

* small nits

* remove the bidirectional stream since it doesn't work in the browser

* final cleanups

* nits

---------

Co-authored-by: Olivier Kannengieser <okanne@gmail.com>
Co-authored-by: Jonathan Kelley <jkelleyrtp@gmail.com>

packages/fullstack/src/encoding.rs

@@ -4,7 +4,7 @@ use serde::{de::DeserializeOwned, Serialize};
 /// A trait for encoding and decoding data.
 ///
 /// This takes an owned self to make it easier for zero-copy encodings.
-pub trait Encoding {
+pub trait Encoding: 'static {
     fn content_type() -> &'static str;
     fn stream_content_type() -> &'static str;
     fn to_bytes(data: impl Serialize) -> Option<Bytes> {