[FEATURE] Allow searching by additional app attributes (category, etc) in the app directory and step selector

It would be great if the [app directory](https://pipedream.com/apps) allowed searching by description instead of just by name.

For example, I would like to search "project management" to see what options are already integrated in Pipedream, but this returns zero results even though several apps are present: Basecamp, Asana, etc.