Various v0.9.9 Changes

This MR contains refactors to the functionality and code organization of the product.

This loom video showcases the new functionality

As a recap, we decided against having premium functionality for subscribers only in favor of adding a custom focus mode which will come with a recommended default. The recommended default can also be not having a custom focus mode because that would make sense for websites like Google and YouTube for which focussed and unfocused modes are sufficient.