Feat/appview routing

[Ashex]

Rather then setting a default appview, we're going to take it a little further by introduce a routing function:

  APPVIEW_ROUTES: [
    {
      pdsHosts: ['blacksky.community', 'northsky.social'],
      BSKY_SERVICE: 'https://api.blacksky.community',
      BSKY_SERVICE_DID: 'did:web:api.blacksky.community',
    },
  ],

What this does, it matched by the PDS/entryway set during login and sets the Appview for the session. This allows us to enforce which appview a user goes to so we don't end up overloading an appview when everyone decides to use the social app and helps maintain a cohesive experience for communities built around a pds/appview.

If a person signs in with a PDS that doesn't match then it will go to the configured fallback.

[github-actions]

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