Create a new page for each category route

[ayush-goyal]

On the frontend, create a new dynamic route /category-group/[category group id] that will use React routers to get the category group. Then on this page, use ProjectCard.tsx to display each of the projects that are submitted for this route. You'll have to likely create a new backend route for project.ts that when passed in a category group, it'll send back all of the projects associated with this category group. This way, sponsors can have essentially their own status page, that'll show all of the projects for a project category.