move doc to class memberdocumentation, rename files in documentation

Documentation/ProjectFile/properties/property/HeatConductionSaturationDependent/c_HeatConductionSaturationDependent.md

-\copydoc MaterialPropertyLib::HeatConductionSaturationDependent

Documentation/ProjectFile/properties/property/HeatConductionSaturationDependent/t_dry.md

-Effective thermal conductivity of the dry material.

Documentation/ProjectFile/properties/property/HeatConductionSaturationDependent/t_wet.md

-Effective thermal conductivity of the wet material.

Documentation/ProjectFile/properties/property/SaturationDependentHeatConduction/c_SaturationDependentHeatConduction.md

+\copydoc MaterialPropertyLib::SaturationDependentHeatConduction

Documentation/ProjectFile/properties/property/SaturationDependentHeatConduction/t_dry.md

+\copydoc MaterialPropertyLib::SaturationDependentHeatConduction::K_dry_

Documentation/ProjectFile/properties/property/SaturationDependentHeatConduction/t_wet.md

+\copydoc MaterialPropertyLib::SaturationDependentHeatConduction::K_wet_

MaterialLib/MPL/Properties/SaturationDependentHeatConduction.h

@@ -37,7 +37,7 @@ public:
                             double const /*dt*/) const override;
 
 private:
-    double const K_dry_;
-    double const K_wet_;
+    double const K_dry_; //< Effective thermal conductivity of the dry material.
+    double const K_wet_; //< Effective thermal conductivity of the wet material.
 };
 }  // namespace MaterialPropertyLib