Debug evaluation-library

[Sichao25]

Debugged all compiler errors and ensured all tests pass for the current work-in-progress in the evaluation library. Set device memory as the default backend for most implementations.

[Sichao25]

Would you mind taking a look at src/pcms/utility/arrays.h? I added some functions to copy between mdspan and view. Since using device memory should minimize the use cases, I've kept those functions with explicit memory space names for clarity. It might be possible to combine them into a single templated function, similar to kokkos copy. Let me know if there's a better approach or if existing methods already handle this.

Update:
It seems we can minimize, or nearly eliminate, the use of these helper functions.

[Sichao25]

@jacobmerson I think this is ready for an initial review. If it looks good, I will reformat the code and open a PR directly to SCOREC/pcms. We can review the CI results there and determine what else should be included in the PR.