[v1.6.0] UI Filter Changes, Added SSO Options, Sleeker Login Buttons, Better Hashtag System, Federation Fixes, Framework Upgrade And More

As this release took a little longer than usual it is more packed with features

For Users

We have a new System for filtering timelines. You can now switch between sub and all without loosing your filters, federation filter moved to the other filters and you can switch between threads and microblogs without loosing your filters. And they look a lot better
for moderators: deleting a thread should now properly federate to remote instances
New page to view a specific comment in a thread, so links always work. You can view that by clicking on the date field. Links in notifications now use that site (for images: #648)
we have reworked the hashtag view. It should be faster now and we added a panel with some stats for it. You'll see that if you click on any hashtag. This was also in preparation for following and blocking hashtags
sleeker look of the crosspost component, for images have a look at: #587
Restyle login/register social and action button sections: they do not look funny when too many SSO providers are available anymore and look better in general
The magazine description should be federating correctly now. The rules are included in that description after a "Rules" header. The rules field will probably removed in a future release, since it is not supported by ActivityPub, so it is kinda deprecated now. The rules should just be included in the magazine description, like it is done on lemmy as well
Removed the View Counter and Statistics
Removed the ratio stat for threads
The magazine list now shows the title of the magazine instead of the fediverse address
improve thumbnails fetching for links

For Admins

Hashtags can now be banned. Posts of any kind with banned hashtags can not be created anymore and existing posts with banned hashtags are hidden in all views, but the hashtag view
Private Instance mode: when private mode is enabled, unauthenticated users cannot view any content of the instance, they MUST be authenticate: #678
option to restrict magazine creation to admins/global moderators
new SSO options: SimpleLogin and Microsoft Azure
the circular messages are finally a thing of the past
actor updates use a lock now to improve performance (prevent multiple updates of the same actor at the same time)
remove ratelimit on user create command
Disable mercure by default on new installations
Add admin panel option to enable/disable SSO only mode
We upgraded Symfony to the new major version 7