Convert OBB to BB

**Is your feature request related to a problem? Please describe.**
Downloaded OBB format images dataset and looking to switch to BB to train other models (other than Yolo) that requires BB.

**Describe the solution you'd like**
Any script, either UI or CLI based is possible to convert it to BB

**Describe alternatives you've considered**
A clear and concise description of any alternative solutions or features you've considered.

**Additional context**
Add any other context or screenshots about the feature request here.