move core::pdu and core::state_res into core::matrix::

Signed-off-by: Jason Volk <jason@zemos.net>

src/api/server/publicrooms.rs

@@ -1,5 +1,6 @@
 use axum::extract::State;
 use axum_client_ip::InsecureClientIp;
+use conduwuit::{Error, Result};
 use ruma::{
 	api::{
 		client::error::ErrorKind,
@@ -8,7 +9,7 @@ use ruma::{
 	directory::Filter,
 };
 
-use crate::{Error, Result, Ruma};
+use crate::Ruma;
 
 /// # `POST /_matrix/federation/v1/publicRooms`
 ///