Description

PR is the final changes prior to v3.0.0 release of JADE.

Testing of SphereOutput.py improved with increased coverage.
Minor updates to documentation
Updates to CI to ensure consistent behaviour.
Other minor modifications to ensure consistent post processing of sphere benchmark with previous JADE.

Checklist:

[x] My code follows the style guidelines of this project
[x] I have performed a self-review of my code
[x] I have commented my code, particularly in hard-to-understand areas
[x] I have made corresponding changes to the documentation
[x] My changes generate no new warnings
[x] ~~I have added tests that prove my fix is effective or that my feature works~~
[x] General testing
- [x] New and existing unit tests pass locally with my changes
- [x] Coverage is >80%