migrate ALMOST everything from source tree into client

source/client/player/input/Keyboard.hpp

@@ -0,0 +1,30 @@
+/********************************************************************
+	Minecraft: Pocket Edition - Decompilation Project
+	Copyright (C) 2023 iProgramInCpp
+	
+	The following code is licensed under the BSD 1 clause license.
+	SPDX-License-Identifier: BSD-1-Clause
+ ********************************************************************/
+
+#pragma once
+
+#include <vector>
+
+class Keyboard
+{
+public:
+	//@TODO: Rename this to KeyboardAction
+	struct Input
+	{
+		int field_0;
+		uint8_t field_4;
+	};
+
+	static std::vector<Input> _inputs;
+	static int _states[256];
+	static int _index;
+
+	// likely inlined
+	static void feed(int down, int key);
+};
+