Add custom hotkeys. (#2340)

Co-authored-by: LosFarmosCTL <80157503+LosFarmosCTL@users.noreply.github.com>
Co-authored-by: Paweł <zneix@zneix.eu>
Co-authored-by: Felanbird <41973452+Felanbird@users.noreply.github.com>
Co-authored-by: Rasmus Karlsson <rasmus.karlsson@pajlada.com>

src/Application.hpp

@@ -15,6 +15,7 @@ class PubSub;
 class CommandController;
 class AccountController;
 class NotificationController;
+class HotkeyController;
 
 class Theme;
 class WindowManager;
@@ -51,6 +52,7 @@ public:
     Fonts *const fonts{};
     Emotes *const emotes{};
     AccountController *const accounts{};
+    HotkeyController *const hotkeys{};
     WindowManager *const windows{};
     Toasts *const toasts{};