universal ids and federated forte servers

[kaangiray26]

Addresses #100 #78 #52

• [x] Communication between forte servers
• [ ] Make codebase more modular
• [x] Page to list all public forte servers
• [x] Editable about page
• [x] Universal ids from Last.fm API
• [x] PGP public and private keys for server identities
• [x] Verifying server identities with identity challenges
• [x] Getting user informations from another server
• [ ] Sending messages to a user on another server
• [ ] Accessing artists, albums, tracks and playlists on another server and playing them only if you can verify your forte server identity via signature
• [ ] Comments on artists and albums
• [ ] Option to follow servers
• [ ] Federated searches based on the servers you follow
• [ ] ActivityPub Implementation
• [ ] A ranking among registered servers to add servers with more content to the top of the list

Adding federated results to favorites:

• [ ] Tracks
• [ ] Albums
• [ ] Artists
• [ ] Playlists
• [ ] Users