Kernel+LibKeyboard: Enable querying the current keymap

Author: https://github.com/BenWiederhake
Commit: a2c21a55e1
Pull-request: https://github.com/SerenityOS/serenity/pull/5192
Reviewed-by: https://github.com/awesomekling
Reviewed-by: https://github.com/bcoles
Reviewed-by: https://github.com/emanuele6
Reviewed-by: https://github.com/linusg

Userland/Libraries/LibKeyboard/CharacterMap.h

@@ -45,6 +45,7 @@ public:
     void set_character_map_data(CharacterMapData character_map_data);
     void set_character_map_name(const String& character_map_name);
 
+    const CharacterMapData& character_map_data() const { return m_character_map_data; };
     const String character_map_name();
 
 private: