Add option to capture the focused monitor

include/CursorTracker.hpp

@@ -0,0 +1,23 @@
+#pragma once
+
+#include <optional>
+#include <string>
+#include <mglpp/system/vec.hpp>
+
+namespace gsr {
+    struct CursorInfo {
+        mgl::vec2i position;
+        std::string monitor_name;
+    };
+
+    class CursorTracker {
+    public:
+        CursorTracker() = default;
+        CursorTracker(const CursorTracker&) = delete;
+        CursorTracker& operator=(const CursorTracker&) = delete;
+        virtual ~CursorTracker() = default;
+
+        virtual void update() = 0;
+        virtual std::optional<CursorInfo> get_latest_cursor_info() = 0;
+    };
+}