Added Include folder

*facepalm*

include/cmd/cmd_prompt.hpp

@@ -0,0 +1,26 @@
+#pragma once
+
+#include "cmd/cmd_base.hpp"
+#include "util/stringliteral.hpp"
+#include "fsh.hpp"
+#include <string>
+
+namespace fsh {
+
+    class CmdPrompt : public Command {
+
+      protected:
+        virtual void register_flags() override {
+            ArgFactory& factory = get_factory();
+            factory.add_rule<StringLiteral>(1);
+        }
+
+        virtual void run(std::istream& in, std::ostream& out, ArgManager& args) override {
+
+            std::string n_prompt = args.get<StringLiteral>(0).value();
+
+            fsh::instance().environment["PROMPT"] = n_prompt;
+        }
+    };
+
+}