Added guide for compiling under Windows (#2060)

* Update documentation to build IronOS in Windows using MSYS2 environment and fix compilation on case-sensitive file systems.

---------

Co-authored-by: Ivan Zorin <ivan.a.zorin@gmail.com>

source/Core/Drivers/Utils.hpp

@@ -0,0 +1,21 @@
+/*
+ * Utils.hpp
+ *
+ *  Created on: 28 Apr 2021
+ *      Author: Ralim
+ */
+
+#ifndef CORE_DRIVERS_UTILS_HPP_
+#define CORE_DRIVERS_UTILS_HPP_
+#include <stdint.h>
+class Utils {
+public:
+  static int32_t InterpolateLookupTable(const int32_t *lookupTable, const int noItems, const int32_t value);
+  static int32_t LinearInterpolate(int32_t x1, int32_t y1, int32_t x2, int32_t y2, int32_t x);
+
+  // Return the required current in X10 for the specified voltage
+  static uint16_t RequiredCurrentForTipAtVoltage(uint16_t voltageX10);
+
+};
+
+#endif /* CORE_DRIVERS_UTILS_HPP_ */