Add mode to open operation

src/main.rs

@@ -1,4 +1,4 @@
-use std::os::mikros::{ipc, syscalls, Errno};
+use std::os::mikros::{ipc, syscalls, Errno, FileOpenMode};
 
 use parking_lot::Mutex;
 use uart::{
@@ -9,7 +9,7 @@ use uart::{
 struct DevServ;
 
 impl dev_driver_rpc::Server for DevServ {
-    fn open(&self, _path: &std::path::Path) -> Result<u64, Errno> {
+    fn open(&self, _path: &std::path::Path, _mode: FileOpenMode) -> Result<u64, Errno> {
         Ok(0)
     }
 }