Implement window sharing with the hl toplevel export proto (#1179)

* implement window sharing

Co-authored-by: Mihai Fufezan <fufexan@protonmail.com>

src/managers/ProtocolManager.hpp

@@ -0,0 +1,13 @@
+#pragma once
+
+#include "../defines.hpp"
+#include "../protocols/ToplevelExport.hpp"
+
+class CProtocolManager {
+public:
+    CProtocolManager();
+
+    std::unique_ptr<CToplevelExportProtocolManager> m_pToplevelExportProtocolManager;
+};
+
+inline std::unique_ptr<CProtocolManager> g_pProtocolManager;