Kernel: Add basic Shell to test functionality

kernel/include/kernel/Shell.h

@@ -0,0 +1,28 @@
+#pragma once
+
+#include <BAN/String.h>
+#include <kernel/Keyboard.h>
+
+namespace Kernel
+{
+
+	class Shell
+	{
+	public:
+		Shell(const Shell&) = delete;
+
+		static Shell& Get();
+
+		void Run();
+
+	private:
+		Shell();
+		void PrintPrompt();
+		void ProcessCommand(BAN::StringView);
+		void KeyEventCallback(Keyboard::KeyEvent);
+
+	private:
+		BAN::String m_buffer;
+	};
+
+}