Blending with Nedelec elements

With these changes it is possible to use blending maps together with Nedelec elements.

• New forms and operators: generated affine (symbolic integration) and blending (quadrature order 2) mass and curl-curl, blending (quadrature order 6) linear form (See https://i10git.cs.fau.de/terraneo/hyteg-form-generator/-/merge_requests/29)
• evaluate now transforms result to physical space
• interpolate interprets input as defined in physical space

Additional changes to the framework:

• Makes it possible to generate a partial toroidal mesh. Instead of the full ring, we can now generate only a slice (in toroidal direction) (78451052)
• Refactoring: Because of the new option for the toroidal mesh generator numToroidalSlices (and mutatis mutandis numPoloidalSlices) is renamed to toroidalResolution throughout the code (53df9cfb)
• Fixes at least one occurrence of auto being used for Point3D. This used to work, however, now that PointND is an Eigen vector, it just asks for trouble.

Tests:

• Forms (curl-curl, mass, linear form) with blending
• Interpolate/evaluate with blending
• GMG L2-Convergence with blending (on a toroidal slice)

src/hyteg/n1e1functionspace/N1E1VectorFunction.hpp

@@ -161,6 +161,14 @@ class N1E1VectorFunction final : public Function< N1E1VectorFunction< ValueType
                 uint_t                                                                                level,
                 DoFType                                                                               flag = All ) const;
 
+   /// \brief Adds the specified constant vector to this function.
+   ///
+   /// `vector` is interpreted as a vector in computational space, i.e. even in
+   /// case of blending, no transformation is applied to `vector`.
+   ///
+   /// \param vector constant vector in computational space
+   /// \param level  refinement level
+   /// \param flag   on which primitives the addition is performed
    void add( VectorType vector, uint_t level, DoFType flag = All ) const;
 
    void add( const std::vector< ValueType >&                                                       scalars,