Add button for sending eventsheet towards DBLV for German Bundesliga matches

[saschaheinl]

This PR contains major changes and some minor boy scout-ish changes.

Major

• Added button which shows in the eventsheet section when the league is set to a German Bundesliga league
• Added function to send eventsheet and event JSON to a Google Cloud Run Function
• Added German and English naming for this

Minor

• Added all dependencies to package.json
• Updated stylelint
• Linted eventsheet.js
• Made Makefile's function dist compatible with macOS as well