0031313: Foundation Classes - Dump improvement for classes

- Provide DumpJson for geometrical, ocaf and visualization classes;
- Change depth parameter of DumpJson (constant is not obligate here)
- Introduce a new macro for transient objects to be called as the first row in DumpJson: OCCT_DUMP_TRANSIENT_CLASS_BEGIN. We need not put the class name in the macro, using get_type_name of Standard_Transient for it.
- change implementation of OCCT_DUMP_CLASS_BEGIN and OCCT_DUMP_TRANSIENT_CLASS_BEGIN. It is not an sentry more and it does not create a new hierarchy level. It appends a new row into the output stream: "className": <className>
- OCCT_DUMP_* does not require semicolon
- class header is included first in source files of TDataStd, TDocStd, TCAFDoc

src/NCollection/NCollection_Vec3.hxx

@@ -18,6 +18,7 @@
 #include <cstring>
 #include <cmath>
 #include <NCollection_Vec2.hxx>
+#include <Standard_Dump.hxx>
 
 //! Auxiliary macros to define couple of similar access components as vector methods
 #define NCOLLECTION_VEC_COMPONENTS_3D(theX, theY, theZ) \
@@ -403,6 +404,13 @@ public:
     return NCollection_Vec3 (Element_t(0), Element_t(0), Element_t(1));
   }
 
+  //! Dumps the content of me into the stream
+  void DumpJson (Standard_OStream& theOStream, Standard_Integer theDepth = -1) const
+  {
+    (void)theDepth;
+    OCCT_DUMP_FIELD_VALUES_NUMERICAL (theOStream, "Vec3", 3, v[0], v[1], v[2])
+  }
+
 private:
 
   Element_t v[3]; //!< define the vector as array to avoid structure alignment issues