Add bio fields (#6645)

* Add bio fields

- Fix #3211
- Fix #232
- Fix #121

* Display bio fields in web UI

* Fix output of links and missing fields

* Federate bio fields over ActivityPub as PropertyValue

* Improve how the fields are stored, add to Edit profile form

* Add rel=me to links in fields

Fix #121

app/lib/activitypub/adapter.rb

@@ -19,6 +19,9 @@ class ActivityPub::Adapter < ActiveModelSerializers::Adapter::Base
         'Emoji'                     => 'toot:Emoji',
         'focalPoint'                => { '@container' => '@list', '@id' => 'toot:focalPoint' },
         'featured'                  => 'toot:featured',
+        'schema'                    => 'http://schema.org#',
+        'PropertyValue'             => 'schema:PropertyValue',
+        'value'                     => 'schema:value',
       },
     ],
   }.freeze