[5] As a user, I want articles to be saved instantly upon changing to never lose any changes

Description

Add methods to save articles calling a method and passing self

ToDo

• Implement function saveArticle(_ feed: Article) in model
• Call method whenever any relevant attribute gets changed
• Call method as last action in original constructor
• Remove Articles from the original save method

Acceptance criteria

• Every change on the article gets saved

Defaults:

• Naming Convention for Classes, Functions and Variables are met
• Comments are sufficient

Effort

5