Add votekick function

Literally 20% of edh tables have some child holding the table hostage. Please add a votekick function to remove problem players and fix games in progress.

Start by tracing how EDH tables and in-progress games handle player removal in the Java game engine. The issue does not name files, entry points, voting rules, permissions, or tests; clarify those requirements before implementation. Done should mean a defined votekick flow can remove a problem player without breaking the game.

Written by the indexing model from the issue text.