Multiple select for Module categories on drupal.org/project/project_module form

Problem/Motivation

If you are looking for for email providers ("Third-Party Integration") and select "Works with"="Drupal 10" and "Module categories"="Mail" on https://www.drupal.org/project/project_module → you get 137 hits.

It would be nice to be able to combine two or more items from "Module categories", for example "Mail" and "Third-Party Integration", to narrow the search down.

Steps to reproduce

Search for a module, and get too many results.

Proposed resolution

Allow narrowing the result with multi-select of category.

Remaining tasks

User interface changes

API changes

Data model changes