Show list of tech, topic, and events tags in project summary tiles

On the browse projects page, add lines to each project's summary box listing out all tags as links that can be clicked to filter the projects list by that tag.

The user profile page provides template markup that would make for a good starting point:

But we want to show each type of tag in one line, using bootstrap's ["Pill Badges"](https://getbootstrap.com/docs/4.0/components/badge/#pill-badges) to wrap and set apart each tag on a line. There will be up to 3 lines if a project has tech, topic, AND event tags, but a line should not be shown for any type that has no tags currently.