input: Introduce basic hyprland HID classes

Implements an intermediary HID class for mice, keyboards and touch devices, removing the old structs from WLClasses.hpp

Yes, virtual ones are duplicated a bit, but will likely be de-duped once wlr_input_device is not used anymore.

src/devices/VirtualKeyboard.hpp

@@ -0,0 +1,28 @@
+#pragma once
+
+#include "IKeyboard.hpp"
+
+class CVirtualKeyboardV1Resource;
+
+class CVirtualKeyboard : public IKeyboard {
+  public:
+    static SP<CVirtualKeyboard> create(SP<CVirtualKeyboardV1Resource> keeb);
+
+    virtual bool                isVirtual();
+    virtual wlr_keyboard*       wlr();
+
+    wl_client*                  getClient();
+
+  private:
+    CVirtualKeyboard(SP<CVirtualKeyboardV1Resource> keeb);
+
+    WP<CVirtualKeyboardV1Resource> keyboard;
+
+    void                           disconnectCallbacks();
+
+    DYNLISTENER(destroy);
+    DYNLISTENER(key);
+    DYNLISTENER(modifiers);
+    DYNLISTENER(keymap);
+    DYNLISTENER(repeatInfo);
+};