Static assertion to Unary (fftshift, ifftshift) and Binary (Plan and fft functions) APIs.

• Exec space and memory space consistency (all)
• View rank and axes rank consistency (all)
• precision consistency (Binary)
• layout consistency (Binary)
• rank consistency (Binary)
• Introduce is_view_operatable_v for Unary operation
• Introduce are_views_operatable_v for Binary operation
• Introduce have_same_precision_v for Binary operation
• Introduce have_same_layout_v for Binary operation
• Introduce have_same_rank_v for Binary operation

Runtime assertion should be std::runtime_error with appropriate messages.
If there is inconsistency in extents, we cannot operate FFT.

• Introduce a precondition wrapper
• replace assert with std::runtime_error
• Add runtime assertion to check choice of axes is applicable to a View

Examples to produce errors should be added.
Display the expected assertions.

• Add an awful example to produce errors

Add CI for C++20 build

• CUDA, HIP and THREAD build with C++ 20