* Add activity page. Copy explore page into home
* Update navbar with activity. Show explore instead if signed out.
* Move category selector into contract search
* Make algolia filter by category
* Default tag page to all filter
* basic market categories
* use tags to store market category
* display category in market
* display full category
* category selector component on feed
* Move feed data fetching to new file
* Decrease batch size for updating feed to prevent out-of-memory error
* Compute and update category feeds!
* Show feeds based on category tabs
* Add react-query package!
* Use react query to cache contracts
* Remove 'other' category
* Add back personal / friends to feed categories
* Show scrollbar temporarily for categories
* Remove 5 categories, change geopolitics to world
* finance => economics
* Show categories on two lines on larger screens
Co-authored-by: James Grugett <jahooma@gmail.com>
