* Refactor session_keys to its own package
* Adjust play_tracker
- Don't send external NowPlaying/Scrobble for tracks with unknown artist
- Continue to the next agent on error
* Implement ListenBrainz Agent and Auth Router
* Implement frontend for ListenBrainz linking
* Update listenBrainzRequest
- Don't marshal Player to json
- Rename Track to Title
* Return ErrRetryLater on ListenBrainz server errors
* Add tests for listenBrainzAgent
* Add tests for ListenBrainz Client
* Adjust ListenBrainzTokenDialog to handle errors better
* Refactor listenbrainz.formatListen and listenBrainzRequest structs
* Refactor agent auth_routers
* Refactor session_keys to agents package
* Add test for listenBrainzResponse
* Add tests for ListenBrainz auth_router
* Update ListenBrainzTokenDialog and auth_router
* Adjust player scrobble toggle
* Check goimports in the pipeline
* Check goimports in the pipeline
* Check goimports in the pipeline
* go mod tidy
* wip
* wip
* Fix goimports and go:build tags
* Run golangci-lint before goimports
* Make authentication part of the server, so it can be reused outside the Native API
This commit has broken tests after a rebase
* Serve frontend assets from `server`, and not from Native API
* Change Native API URL
* Fix auth tests
* Refactor server authentication
* Simplify authProvider, now subsonic token+salt comes from the server
* Don't send JWT token to UI when authenticated via Request Header
* Enable ReverseProxyWhitelist to be read from environment
See https://pkg.go.dev/github.com/robfig/cron#hdr-CRON_Expression_Format for expression syntax.
`ScanInterval` will still work for the time being. The only situation it does not work is when you want to disable periodic scanning by setting `ScanInterval=0`. If you want to disable it, please set `ScanSchedule=""`
Closes#1085
