Qt: Implement GDB server

src/duckstation-qt/gdbserver.h

@@ -0,0 +1,19 @@
+#pragma once
+#include "core/types.h"
+#include "gdbconnection.h"
+#include <QtNetwork/QTcpServer>
+
+class GDBServer : public QTcpServer
+{
+  Q_OBJECT
+
+public:
+  GDBServer(QObject* parent, u16 port);
+  ~GDBServer();
+
+protected:
+  void incomingConnection(qintptr socketDescriptor) override;
+
+private:
+  std::list<GDBConnection*> m_connections;
+};