Split tropical_cyclone module

[ThomasRoosli]

Changes proposed in this PR:

• The very large trop_cyclone.py file is split in two
• One part is the Trop_Cyclone class
• The other part is the windfields calculation using the different Holland or other models, the interface between the two submodules is one single function.

This PR fixes no specific issue, but is was mentioned in the discussion of #846

PR Author Checklist

• Read the Contribution Guide
• Correct target branch selected (if unsure, select develop)
• Descriptive pull request title added
• Source branch up-to-date with target branch
• Documentation updated
• Tests updated
• Tests passing
• No new linter issues
• Changelog updated

PR Reviewer Checklist

• Read the Contribution Guide
• CLIMADA Reviewer Checklist passed
• Tests passing
• No new linter issues

[peanutfun]

Very good work! It is now much easier to get an overview of the module. I have suggestions that should fix some linter issues.

The change in module structure broke the module documentation. You will have to add two automodule directives for the new submodules in the last section of doc/climada/climada.hazard.rst. If you are confused say so, and I will try to fix it before merging. Thanks! 🙏

[ThomasRoosli]

Thanks for your suggestions. I agree with them. I am happy to further discuss the exposed constants.