[refactor] Articles processing

[vmeylan]

The current articles processing has copy pasted methods while we can simplify down with config json and adapting to a few edge cases. Most of the time it is mostly about changing the CSS selector for each title, author, release date (+ correct formatting into yyyy-mm-dd), and content.

We can make something cleaner there where each CSS selector and date format is a parameter.
Even better: automate the process with a scrapping tool