Add an option to show/hide password in password fields

[coudot]

A common request we have is to add a show/hide button on password inputs like we have in a lot of products.

[coudot]

@abpai94 could you look at what has been done in #1065 and also how we do in LemonLDAP::NG: https://gitlab.ow2.org/lemonldap-ng/lemonldap-ng/-/blob/v2.0/lemonldap-ng-portal/site/js-src/portal.js#L554

We need to have a configuration option for this.