fix(idm): reimplement packet processing algorithm (#330)

* chore(xen): rewrite event channel code

* fix(idm): repair idm bugs on the file backend

crates/xen/xenevtchn/Cargo.toml

@@ -9,6 +9,7 @@ edition = "2021"
 resolver = "2"
 
 [dependencies]
+byteorder = { workspace = true }
 libc = { workspace = true }
 log = { workspace = true }
 thiserror = { workspace = true }