Kernel: KeyEvent is now well known keycode

Keycodes are easier to handle as you need only one keyboard layout
for keycodes. Otherwise you would need to implement keyboard layout
for every keyboard driver in every language.

kernel/CMakeLists.txt

@@ -32,6 +32,8 @@ set(KERNEL_SOURCES
 	kernel/FS/TmpFS/FileSystem.cpp
 	kernel/FS/TmpFS/Inode.cpp
 	kernel/FS/VirtualFileSystem.cpp
+	kernel/Input/KeyboardLayouts/FI.cpp
+	kernel/Input/KeyEvent.cpp
 	kernel/Input/PS2/Controller.cpp
 	kernel/Input/PS2/Device.cpp
 	kernel/Input/PS2/Keyboard.cpp