Feat: Implemented the final major feature of the app which is the comparison view + a lot of minor bug fixes

Fix: Reworked and fixed the behaviour of the dropdown button + Refactored multiple files in the codebase + managed to get prettier for tailwind to work

Fix: Optimized the animations across the app. + Feat: Implemented the functionality for hovering over advanced metrics to get explanations of the metrics

Feat: Redesigned advanced metrics views. + Decoupled multiple functions following the DRY principle + Added country flags to the initial data view

Feat: Established connection with the database for loading valid urls. Incorporated functionality for checking it and reworked the background worker to check for both the brand of the product as well as the store that is selling it.
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