Sort filter options alphabetically

[BramVanroy]

The filtering options on the model and dataset pages are still growing which is awesome! For instance, on the model hub, especially the tasks and languages are getting a lot of options. However, with great options comes great responsibility - it becomes harder and harder to find the task/language/license/... that you are interested in.

I have two suggestions, one easier to implement than the other:

1. sort the options (e.g., all language options) alphabetically so that it is easy for users to find what they need;
2. add a "filter" field to every option, something like this:

[osanseviero]

cc @gary149 @julien-c on this

Note that the search experience will be having some changes in the incoming months :)