Abstract Pdu filter matching into trait Event.

Abstract Pdu unsigned accessors into trait Event.

Abstract Pdu relation related into trait Event.

Abstract PDU content into trait Event.

Move event_id utils from pdu to event.

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

src/api/client/membership/join.rs

@@ -26,7 +26,8 @@ use tuwunel_core::{
 	Err, Result, debug, debug_info, debug_warn, err, error, info,
 	matrix::{
 		StateKey,
-		pdu::{PduBuilder, PduEvent, gen_event_id, gen_event_id_canonical_json},
+		event::{gen_event_id, gen_event_id_canonical_json},
+		pdu::{PduBuilder, PduEvent},
 		state_res,
 	},
 	result::FlatOk,