Coding - PCH improvements #160

Refactor precompiled headers and improve Windows compatibility.
Extend TKernel, TKMath and TKBRep pch with more usage headers.
Implement PCH for TKDEIGES, TKDESTEP, TKMesh, and TKXSBase.

src/TKBRep/TKBRep_pch.hxx

@@ -1,33 +1,19 @@
 #ifndef TKBRep_HXX
 #define TKBRep_HXX
 
-// Windows-specific headers (for MSVC)
-#ifdef _WIN32
-#ifndef NOMINMAX
-#define NOMINMAX
-#endif
-#include <windows.h>        // For Windows API functions like WideCharToMultiByte
-#include <tchar.h>          // For Unicode/MBCS mappings
-#ifdef GetObject
-#undef GetObject
-#endif
-#endif
-
-#include <TopoDS_Shape.hxx>
-#include <TopoDS_Solid.hxx>
-#include <TopoDS_Shell.hxx>
-#include <TopoDS_Face.hxx>
-#include <TopoDS_Wire.hxx>
-#include <TopoDS_Edge.hxx>
-#include <TopoDS_Vertex.hxx>
+#include <TopoDS_Builder.hxx>
 #include <TopoDS_CompSolid.hxx>
 #include <TopoDS_Compound.hxx>
-#include <TopoDS_Builder.hxx>
+#include <TopoDS_Edge.hxx>
+#include <TopoDS_Face.hxx>
 #include <TopoDS_Iterator.hxx>
+#include <TopoDS_Shape.hxx>
+#include <TopoDS_Shell.hxx>
+#include <TopoDS_Solid.hxx>
+#include <TopoDS_Vertex.hxx>
+#include <TopoDS_Wire.hxx>
 
 #include <BRep_Builder.hxx>
 #include <BRep_Tool.hxx>
 
-#include <BRepTools.hxx>
-
 #endif // TKBRep_HXX