examples: kokkos examples conversion (workload to workunit)

[nayyirahsan]

Converts all examples in examples/kokkos/ from the deprecated workload/functor style to the modern standalone style as requested in issue #351 (part of the broader deprecation effort #326).

[IvanGrigorik]

Mostly LG, besides my comment above
You should also do the proper formatting (all files should end with \n)

[gliga]

Mostly LG, besides my comment above You should also do the proper formatting (all files should end with \n)

I hope that our CI checks this

[IvanGrigorik]

Mostly LG, besides my comment above You should also do the proper formatting (all files should end with \n)

I hope that our CI checks this

Yes, that's why formatting CI fails:
https://github.com/kokkos/pykokkos/actions/runs/21275692811/job/61309485939?pr=355#step:5:657

[IvanGrigorik]

@nayyirahsan CIs are still failing.
Please, check out black formatter tool and format your code