MINOR: Frontend refactor

[jacob-macleod]

Refactored code

Description

Changed

• Refactored code by adding more folders to more easily manage componments
• Removed unneeded files

Pull Requestor Checklist

• [x] Does backend/database/database_config.py have the type of production?
• [x] Does frontend/src/api/config.js have the correct server url, reading from the deployed instance at http://dolphinflashcards.com/api/?
• [x] If not merging development to main, is the MR title prefixed with MAJOR, MINOR or PATCH?
• [x] Has backend/__init__.py been updated with the relevant version, following the semantic versioning standard
• [x] Has CHANGELOG.md been updated to explain the new version?