feat: filter projects by tags

[NicoSerranoP]

1. There should be a tag bar with research, dApps, infrastructure and education so when users click on one they will see only projects related to that specific tag. I do not think we need to filter by 2 tags at the time but it would be a great feature

2. The tags in each project card look like clickable but they redirect you to the project individual page. If we cannot make the tag clickable to filter tag-related projects then we should remove the button-like features of the tag (specially the hover effect)