[refactor] add namespace 'crossdesk' to codebase

src/device_controller/keyboard/windows/keyboard_capturer.cpp

@@ -2,6 +2,8 @@
 
 #include "rd_log.h"
 
+namespace crossdesk {
+
 static OnKeyAction g_on_key_action = nullptr;
 static void* g_user_ptr = nullptr;
 
@@ -53,4 +55,5 @@ int KeyboardCapturer::SendKeyboardCommand(int key_code, bool is_down) {
   SendInput(1, &input, sizeof(INPUT));
 
   return 0;
-}
+}
+}  // namespace crossdesk