[Voyageurs] Add a basic ps/2 keyboard driver.

sys/voyageurs/voyageurs_server.h

@@ -0,0 +1,20 @@
+#pragma once
+
+#include <glacier/memory/unique_ptr.h>
+#include <glacier/status/error_or.h>
+
+#include "keyboard/keyboard_driver.h"
+#include "voyageurs/voyageurs.yunq.server.h"
+
+class VoyageursServer : public VoyageursServerBase {
+ public:
+  static glcr::ErrorOr<glcr::UniquePtr<VoyageursServer>> Create(
+      KeyboardDriver& keyboard_driver);
+
+  virtual glcr::ErrorCode HandleRegisterKeyboardListener(
+      const KeyboardListener& listener, None&) override;
+
+ private:
+  KeyboardDriver& keyboard_driver_;
+  VoyageursServer(z_cap_t voyageurs_cap, KeyboardDriver& keyboard_driver);
+};