Use linux /dev/input for global hotkeys instead of x11. This also works on wayland on any compositor

include/GlobalHotkeysLinux.hpp

@@ -0,0 +1,24 @@
+#pragma once
+
+#include "GlobalHotkeys.hpp"
+#include <unordered_map>
+#include <sys/types.h>
+
+namespace gsr {
+    class GlobalHotkeysLinux : public GlobalHotkeys {
+    public:
+        GlobalHotkeysLinux();
+        GlobalHotkeysLinux(const GlobalHotkeysLinux&) = delete;
+        GlobalHotkeysLinux& operator=(const GlobalHotkeysLinux&) = delete;
+        ~GlobalHotkeysLinux() override;
+
+        bool start();
+        bool bind_action(const std::string &id, GlobalHotkeyCallback callback) override;
+        void poll_events() override;
+    private:
+        pid_t process_id = 0;
+        int pipes[2];
+        FILE *read_file = nullptr;
+        std::unordered_map<std::string, GlobalHotkeyCallback> bound_actions_by_id;
+    };
+}