Foundation Classes, gp - Mark core types and methods constexpr/noexcept (#790)

Make gp basic types and operations more constexpr-friendly and noexcept:
- Mark gp::Resolution as constexpr.
- Add constexpr and/or noexcept to many constructors and small access/modifier methods.
- Convert several functions to constexpr where safe to allow compile-time evaluation.
- Initialize members via initializer lists for several GTrsf/GTrsf2d/Mat/etc constructors.
- Add noexcept to transformation/serialization helpers and small utilities where appropriate.

This enables better compile-time optimizations and safer noexcept semantics across TKMath gp primitives.

src/ModelingAlgorithms/TKBool/BRepFill/BRepFill_CompatibleWires.cxx

@@ -1648,7 +1648,6 @@ void BRepFill_CompatibleWires::ComputeOrigin(const Standard_Boolean /*polar*/)
   // reorganize the wires respecting orientation and origin
 
   TopoDS_Vertex Vdeb, Vfin;
-  gp_Pnt        Pdeb, Psuiv, PPs;
 
   BRepTools_WireExplorer anExp;
 
@@ -1979,6 +1978,9 @@ void BRepFill_CompatibleWires::ComputeOrigin(const Standard_Boolean /*polar*/)
   }
 #ifdef OCCT_DEBUG_EFV
 
+  gp_Pnt PPs;
+  gp_Pnt Pdeb, Psuiv;
+
   for (i = ideb; i <= myWork.Length(); i++)
   {