Remove codec::Encode and codec::Decode derives from generated APIs by default (#2008)

* Remove codec::Encode and codec::Decode from generated APIs by default

* clippy fixes

* clippy

* More fixes, and CompactAs only if Encode/Decode

* revert println in example

* fix lightclient test

* fix docs

* Fix another rust doc comment

* Fix failing storage test

* Remove now-unnecessary test

* clippy

* clippy

* Remove pointless clone

lightclient/src/platform/wasm_platform.rs

@@ -149,8 +149,7 @@ impl PlatformRef for SubxtPlatform {
 
         let socket_future = async move {
             tracing::debug!(target: LOG_TARGET, "Connecting to addr={addr}");
-            WasmSocket::new(addr.as_str())
-                .map_err(|err| std::io::Error::new(std::io::ErrorKind::Other, err.to_string()))
+            WasmSocket::new(addr.as_str()).map_err(|err| std::io::Error::other(err.to_string()))
         };
 
         future::ready(super::wasm_helpers::Stream(with_buffers::WithBuffers::new(

lightclient/src/platform/wasm_socket.rs

@@ -176,9 +176,7 @@ impl AsyncRead for WasmSocket {
         }
 
         match inner.state {
-            ConnectionState::Error => {
-                Poll::Ready(Err(io::Error::new(io::ErrorKind::Other, "Socket error")))
-            }
+            ConnectionState::Error => Poll::Ready(Err(io::Error::other("Socket error"))),
             ConnectionState::Closed => Poll::Ready(Err(io::ErrorKind::BrokenPipe.into())),
             ConnectionState::Connecting => Poll::Pending,
             ConnectionState::Opened => {
@@ -206,17 +204,12 @@ impl AsyncWrite for WasmSocket {
         inner.waker = Some(cx.waker().clone());
 
         match inner.state {
-            ConnectionState::Error => {
-                Poll::Ready(Err(io::Error::new(io::ErrorKind::Other, "Socket error")))
-            }
+            ConnectionState::Error => Poll::Ready(Err(io::Error::other("Socket error"))),
             ConnectionState::Closed => Poll::Ready(Err(io::ErrorKind::BrokenPipe.into())),
             ConnectionState::Connecting => Poll::Pending,
             ConnectionState::Opened => match self.socket.send_with_u8_array(buf) {
                 Ok(()) => Poll::Ready(Ok(buf.len())),
-                Err(err) => Poll::Ready(Err(io::Error::new(
-                    io::ErrorKind::Other,
-                    format!("Write error: {err:?}"),
-                ))),
+                Err(err) => Poll::Ready(Err(io::Error::other(format!("Write error: {err:?}")))),
             },
         }
     }