Kernel: Introduce a new HID subsystem

The end goal of this commit is to allow to boot on bare metal with no
PS/2 device connected to the system. It turned out that the original
code relied on the existence of the PS/2 keyboard, so VirtualConsole
called it even though ACPI indicated the there's no i8042 controller on
my real machine because I didn't plug any PS/2 device.
The code is much more flexible, so adding HID support for other type of
hardware (e.g. USB HID) could be much simpler.

Briefly describing the change, we have a new singleton called
HIDManagement, which is responsible to initialize the i8042 controller
if exists, and to enumerate its devices. I also abstracted a bit
things, so now every Human interface device is represented with the
HIDDevice class. Then, there are 2 types of it - the MouseDevice and
KeyboardDevice classes; both are responsible to handle the interface in
the DevFS.

PS2KeyboardDevice, PS2MouseDevice and VMWareMouseDevice classes are
responsible for handling the hardware-specific interface they are
assigned to. Therefore, they are inheriting from the IRQHandler class.

Kernel/CMakeLists.txt

@@ -32,19 +32,23 @@ set(KERNEL_SOURCES
     Devices/CharacterDevice.cpp
     Devices/Device.cpp
     Devices/FullDevice.cpp
-    Devices/I8042Controller.cpp
-    Devices/KeyboardDevice.cpp
     Devices/MBVGADevice.cpp
     Devices/MemoryDevice.cpp
     Devices/NullDevice.cpp
     Devices/PCSpeaker.cpp
-    Devices/PS2MouseDevice.cpp
     Devices/RandomDevice.cpp
     Devices/SB16.cpp
     Devices/SerialDevice.cpp
     Devices/USB/UHCIController.cpp
     Devices/VMWareBackdoor.cpp
     Devices/ZeroDevice.cpp
+    Devices/HID/I8042Controller.cpp
+    Devices/HID/HIDManagement.cpp
+    Devices/HID/KeyboardDevice.cpp
+    Devices/HID/MouseDevice.cpp
+    Devices/HID/PS2KeyboardDevice.cpp
+    Devices/HID/PS2MouseDevice.cpp
+    Devices/HID/VMWareMouseDevice.cpp
     Storage/Partition/DiskPartition.cpp
     Storage/Partition/DiskPartitionMetadata.cpp
     Storage/Partition/EBRPartitionTable.cpp