Migration of `lumslurm` to PyLumerical

### 📝 Description of the feature

Lumerical currently ships with a Python package for interfacing with Slurm clusters (https://optics.ansys.com/hc/en-us/articles/20990924220691-Getting-Started-with-lumslurm-Python-API). This feature captures the work required to migrate that package here.

### 💡 Steps for implementing the feature

_No response_

### 🔗 Useful links and references

_No response_

Start by reviewing the linked Lumerical lumslurm Python API documentation and the existing pylumerical repository structure. The issue provides no files, tests, entry points, or implementation steps, so first establish the migration scope and identify the functionality that must be reproduced. Done means the lumslurm package is migrated into PyLumerical with its expected functionality available here.

Written by the indexing model from the issue text.