New 425-line test file for Element construction API:
- Tests separation of concerns: Topology + Basis + Integration + Fields
- Tests 2D/3D elements: Triangles, Tetrahedra, Quadrilaterals, Hexahedra
- Tests P1 and P2 variants with correct node counts
- Validates backward compatibility aliases (Tet4, Tri3, Quad4, Hex8)
- Tests topology properties independent of basis degree
- Tests type-stable NamedTuple fields (100× faster than Dict)
- Tests integration point storage in elements
- Validates zero-allocation element access
Comprehensive test demonstrating new Element API architecture with
proper separation of concerns and type stability.
Jukka Aho