eslint: array callback return, no restricted imports

Make connections more verbose and include some setup instructions

Fix some JSdoc errors

lintstagedrc: regenerate schemas/openapi if schemas changed

No more fallback URLs

Prettier u6

Fix bad imports

Move schemas to separate module

Use front end URI instead of API

Fix connection class imports

License information

Move redirect uri generation to getRedirectUri function of Connection class. ...

Use api_endpointPublic instead of cdn_endpointPublic

Refreshable connections, refactoring, access-token endpoint ...

- Aded /users/@me/connections/:connection_name/:connection_id/access-token
- Replaced `access_token` property on ConnectedAccount with `token_data` object for refreshing tokens
- Made a common interface for connection things like ComonOAuthTokenResponse
- Added `RefreshableConnection` class
- Added token refresh to Spotify connection (disabled)

`handleCallback` returns connection if created for `USER_CONNECTIONS_UPDATE`

adding connection now works

add connections