Feature/quake

[chahank]

Changes proposed in this PR:

• A simple Earthquake model. Based on the previous MatLab version.

This PR fixes #

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

[chahank]

• Tests currently fail to build for reasons not related to this PR.

• The underlying file currently needs to be downloaded manually (the download link requires an email, thus it is not automated). A separate PR can then take care of uploading the file to the CLIMADA API and make it available to users as fallback option (and as test file).