Is there an existing issue for this?

• I have searched the existing issues

Is your feature request related to a problem?

Often if I'm looking for an add-on for a specific service, I have to grep to find them (e.g. ddev add-on list --all | grep memcached) because most of the add-ons aren't related to what I'm looking for.

Describe your solution

Allow an argument (or multiple arguments) to the ddev add-on list command for search terms.
If any of the search terms is found in the name or description of an add-on, display it. Don't display unrelated add-ons.
If no add-ons have the search term(s), display a helpful message like "no repositories found with those search terms"

For example I could use ddev add-on list --all memcached to find any add-ons related to memcached. Or ddev add-on list --installed memcached to list any installed add-ons which are related to memcached.

Describe alternatives

A new ddev add-on search command could be added - though the only reason I can think for doing it this way is if you want to reserve arguments to the list command for some future functionality.

There is also the registry online - but I don't wanna go fish out the URL for that and use a browser-based solution when I'm already in my terminal working away.

Additional context

No response