Introduction of Sender Class

[kzscisoft]

Refactor sender functionality to align with second generation API

Issue:

• Track sender errors in a Simvue run #874

Python Version(s) Tested: 3.14

Operating System(s): Ubuntu 25.04

Documentation PR: https://github.com/simvue-io/docs/pull/86

📝 Summary

Refactors simvue/sender.py into a dedicated module, defining the Sender class as a replacement.

🔄 Changes

• Defines upload actions for each object type as an expandable solution.
• Adds a Simvue run to the upload process for tracking progress.
• General refactoring and tidying.

✔️ Checklist

• Unit and integration tests passing.
• Pre-commit hooks passing.
• Quality checks passing.
• Updated the documentation.