feat: add forcing options.

[cookiemumbles]

As stated here: https://github.com/cookiemumbles/justmytoots.com/issues/48#issuecomment-1396079778

I'll be adding a feature for forcing the options set by the justmytoots-link author (like I've mentioned above). It would be for anyone that would want to justmytoots but is wants to have a choice in what people get to see. To opt-in, people have to put a link in their bio anyway, and that link can also contain additional options that I can read to determine if the option menu should even be allowed or if the options should be forced to the author's settings. This should be relatively straight forward to implement. This is "opt-out" in stead of "opt-in" but arguably hidden behind an opt-in service. And also this is in line with for example Mastodon's own "Opt-out of search engine indexing" option that is also not enabled by default.

Initial version could just be any options specified in the url are always forced. Would long term be best integrated in a "set me up" page -> #63

[cookiemumbles]

There is a concrete desire for this feature, so prioritize: https://github.com/cookiemumbles/justmytoots.com/issues/48#issuecomment-1426933737