`:hades:option:` role does not produce reference

[lukasjuhrich]

As witnessed in the above image, an option XRef like :hades:option:`HADES_SITE_NAME`​ is not passed correctly, even though said option exists and is autodocumented properly

When this issue is fixed, we should instantiate the XRefRole with warn_dangling=True in the role definition:

hades/src/hades/config/sphinx.py

Lines 55 to 57 in 7878283

	roles = {
	'option': XRefRole(),
	}

Enabling this currently would lead to a lot of warnings (one per invocation).