Event infobox

[hjpalpha]

depends on #6355

Summary

• to replace https://liquipedia.net/fighters/Template:Infobox_league_overview
• to be a level between series and league
• data storage very basic for now, more/better storage oos
• as such event infoboxes might have proper location also add the accomodation button on them

How did you test this change?

dev + smoke/golden