Add support for other fediverse applications

[Someguy123]

Some people have requested adding support for other apps such as Calckey, Misskey, Lemmy, maybe GNU Social, etc.

This would likely require some kind of software detection, to figure out what kind of software an instance is running, possibly should assume mastodon first, then if it fails, do detection, cache the detection result for future requests, and then use the APIs / templates designed for that software.

Would probably need to refactor the service into a class + adapter based approach, so that it's possible to easily write adapters for other fediverse software as needed

NOTE: This is a LOW PRIORITY issue, for now it's more important to focus on making the service work best for Mastodon, and only then start to work on adding support for other fediverse software