Implement round end logic

[0xLucqs]

Description

As per the game rules, once a player has won 2 rounds the game ends. Once a player has scored a goal the round ends and it's reset if no player has won 2 rounds

Acceptance criteria

• The round is reset when someone scores a goal and no one has won 2 rounds.
• The game ends when someone wins 2 rounds.
• The events log the round number