added: input and its subclasses

src/console_input.h

@@ -0,0 +1,16 @@
+#ifndef __CONSOLE_INPUT_H__
+#define __CONSOLE_INPUT_H__
+
+#include <iostream>
+#include "input.h"
+
+class console_input final : public input {
+private:
+        std::istream &in;
+public:
+        // This is for cin
+        console_input(std::istream &cin);
+        game_command get_command() override;
+};
+
+#endif