Add a new 'RLModules' and 'RLStyleModules' configuration options that
allow a contact page to specify list of ResourceLoader modules and/or
CSS only modules to add to the output page that is used to display the
form.
Bug: T95789
Change-Id: Ic10c4b3c6a402c5cebc34f675672552b7d9ebb67
Add a 'DisplayFormat' configuration value that tells HTMLForm which output
styling should be used. This can be used for example to change the form
to the 'vform' style which uses the Mediawiki.ui css styles.
Change-Id: I04d2959b80a44e31f1e04324b26e6dff5ea5b4a6
codynguyen1116