Code Refactor

[T2703]

Short description of what this resolves:

These changes help refactor the code making it easier to maintain for the future and consistency for the software's architecture. With these changes it will help ensure that the code base is easier to understand and helps remove unnecessary lines of code that don't need to be there and can help speed up performance and can reduce the amount of bugs. These newer changes also help separate domain model and application logic.

More clarification on the changes:
In the event model the starts_at and ends_at date time field have been refactored to a TSTZRANGE data type since the date times were heavily connected it would be better to simplify them to a single field on the model and the new data type would help reduce the boilerplate code.

The domain driven bounded contexts on this project is not clarified enough and thus we created context modules such as event, financial, communication, and form. This will help maintain the DDD for the codebase.

Another change for the SOLID principles on this project. The new changes also help separate domain model and application logic by breaking a huge method into smaller sub methods making it easier to maintain and understand it also helps keeps simplicity.

Checklist

• [ ✓] I have read the Contribution & Best practices Guide and my PR follows them.
• [✓ ] My branch is up-to-date with the Upstream development branch.
• [✓ ] The unit tests pass locally with my changes
• [ ✓] I have added tests that prove my fix is effective or that my feature works
• [✓ ] I have added necessary documentation (if appropriate)

• [✓ ] All the functions created/modified in this PR contain relevant docstrings.

[sourcery-ai]

The pull request #9142 has too many files changed.

We can only review pull requests with up to 300 changed files, and this pull request has 302.