HACS integration

[neuhausf]

I did some effort to simplify the installation: https://github.com/neuhausf/lovelace-swiss-stationboard

• Removed the dependency of moment.js as it seem to cause problems
• HACS installation possible

TODO:

• localize some strings
• test delay visualization (doesn't work?)

The final goal should be a proper update of the current swiss_public_transport sensor. So feel free to do a merge request again or to improve your own implementation.