Kokkos 5.0 migration + 0.1 version release

[IvanGrigorik]

It would be good to have our first release.
This issue duplicates some objectives from kokkos/pykokkos-base#69

Before releasing, we need to make sure that the following things are done:

• Migrate deprecated script format (like compile.sh) to CMakeLists files (if possible)
• recompilation time speedup. (for now, we have to remove pk_cpp and re-compile the whole thing again. We need to change the C++ side, like functor.hpp, functor_cast.hpp, bindings.cpp, and call the compiler if the kernel was changed. No need to recompile the Kokkos.
• We should have something like nightlies that build with develop once per day and report so the versions don't fall out of sync
• The configuration options via the setup.py README section are outdated (FIXME)
• Completely remove workunit-related ufuncs (ufuncs that we can call from workunits that take a View as an argument)
• Remove pk.View abstraction from the user side. We should accept numpy/cupy/tensorflow arrays as input arguments (depends on Remove View abstraction #333)
• Finalize workload removal from examples (depends on Remove Workload style of kernels #326 and examples workload deprecation #351)

Further plans (after 0.1 version) should include:

• Conda and PyPI release for CPU, so we would be able to install pykokkos like pip/conda install pykokkos
• Compilation speedups (depends on Kokkos and CUDA forward includes)

[kennykos]

w.r.t. nightly runs, we can merge #327 once we can build against Kokkos 5.0