Show server info somewhere

[nikclayton]

Servers provide information about posting limits and other info at /api/v2/instance.

Some of that information could be useful to bundle up and display on a screen to the user somewhere. Maybe on the "About" screen (might be a bit non-discoverable), maybe as another tab on their profile screen (makes some sense, since the profile is tied to a specific server).

Maybe as account preferences? They're not user-settable preferences, but maybe that's the most discoverable place?

Useful information to highlight could be:

• max_featured_tags
• max_characters
• max_media_attachments
• supported_mime_types
• image_size_limit
• image_matrix_limit (rendered as useful maximum width/height)
• video_size_limit
• video_matrix_limit (ditto)
• polls > max_options
• polls > max_characters_per_option
• polls > max_expiration
• translation > enabled
• contact info
• server rules