* Add feautre group header fragment for homepage.
* Add feature group headers to feature groups.
* Style feature groups.
* Add collapsing/expanding functionality as well as a favorites section.
* Cards are now sorted in the order of update link > favorite > alphabetical on the homepage.
* Decrease space between section title and cards.
* Add filtering buttons and view options to homepage.
* Hide list view button in preparation for release.
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Co-authored-by: FiratUsta <ahmetfiratusta@gmail.com>
