Step-up transformer tap changer support: feature branch

[Jerry-Jinfeng-Guo]

This is the feature branch for step-up transformer tap changer support. Closes #662.

Dedicated tests:

• Validation test case
• Meshed grid test case [https://github.com/auto tap validation test for meshed grid with transformers #777]

Feature additions (w/ unit tests):

• Transformer weight 1 to 0 [https://github.com/Feature / Updated transformer weight before transformer ranking #698]
• Additional validation (core+py) [https://github.com/Feature / add unique regulators condition to data validator #829]
• Updated ranking [https://github.com/Feature / Step-up transformer tap changer support updated ranking #832]
• Updated control logic
• Updated control logic for binary search

[sonarcloud]

Quality Gate passed

Issues
2 New issues
0 Accepted issues

Measures
0 Security Hotspots
94.9% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud