This commit introduces a series of improvements on the Plans module including function renaming, documentation and readability. This is the groundwork for billing plans.
There should be no actual changes with this commit, therefore no changes in tests either.
* Add filter groups
* New flow for filters
* Visual consistency
* Mobile improvements to dropdown
* Do not let filters wrap on a new line
* Fix country filter
* Add mix format to pre-commit configuration
* Make eslint happy
* Fix formatting
* Use transition from headlessUI
* Add background job to send renewal notification
* Use copy from Marko
* Add expiration email in case the user has cancelled
* Add queue config
* Use correct tag for expiration email
