Import: DXF parser, add stats reporting structure

src/Mod/Import/App/dxf/dxf.cpp

@@ -2342,6 +2342,7 @@ bool CDxfRead::SkipBlockContents()
 template<typename... args>
 void CDxfRead::UnsupportedFeature(const char* format, args&&... argValuess)
 {
+    m_stats.unsupportedFeaturesCount++;
     // NOLINTNEXTLINE(runtime/printf)
     std::string formattedMessage = fmt::sprintf(format, std::forward<args>(argValuess)...);
     // We place these formatted messages in a map, count their occurrences and not their first
@@ -2538,6 +2539,8 @@ bool CDxfRead::ReadVersion()
         m_version = RUnknown;
     }
 
+    m_stats.dxfVersion = m_record_data;
+
     return ResolveEncoding();
 }
 
@@ -2606,6 +2609,9 @@ bool CDxfRead::ResolveEncoding()
         Py_DECREF(pyDecoder);
         Py_DECREF(pyUTF8Decoder);
     }
+
+    m_stats.dxfEncoding = m_encoding;
+
     return !m_encoding.empty();
 }
 
@@ -2759,6 +2765,9 @@ bool CDxfRead::ReadEntity()
         m_entityAttributes.m_paperSpace);  // TODO: Ensure the stream is noboolalpha (for that
                                            // matter ensure the stream has the "C" locale
     SetupValueAttribute(eColor, m_entityAttributes.m_Color);
+
+    m_stats.entityCounts[m_record_data]++;
+
     // The entity record is already the current record and is already checked as a type 0 record
     if (IsObjectName("LINE")) {
         return ReadLine();

src/Mod/Import/App/dxf/dxf.h

@@ -176,6 +176,18 @@ struct LWPolyDataOut
     point3D Extr;
 };
 
+// Statistics reporting structure
+struct DxfImportStats
+{
+    double importTimeSeconds = 0.0;
+    std::string dxfVersion;
+    std::string dxfEncoding;
+    std::map<std::string, int> entityCounts;
+    std::map<std::string, std::string> importSettings;
+    int totalEntitiesCreated = 0;
+    int unsupportedFeaturesCount = 0;
+};
+
 
 // "using" for enums is not supported by all platforms
 // https://stackoverflow.com/questions/41167119/how-to-fix-a-wsubobject-linkage-warning
@@ -455,6 +467,7 @@ private:
     double m_unitScalingFactor = 0.0;
 
 protected:
+    DxfImportStats m_stats;
     // An additional scaling factor which can be modified before readDXF is called, and will be
     // incorporated into m_unitScalingFactor.
     void SetAdditionalScaling(double scaling)