Add Friendica support

[xal]

Friendica have Mastodon API adapter

• Supported Mastodon APIs: https://forum.friendi.ca/help/API-Mastodon
• Friendica-related APIs: https://forum.friendi.ca/help/API-Friendica
• Friendica is using a Twitter/GNU Social compatible API, which means you can use any Twitter/GNU Social client for your platform as long as you can change the API path in its settings. Since the 2021.06 release, Friendica also supports the Mastodon API which works with many Mastodon clients. Here is a list of known working clients:

POPULATION ~ 10.241 accounts
ACTIVE USERS~ 5.344people
SERVERS > 335instances

• https://fediverse.party/en/friendica