Add showMatchScore setting and forfeit button

Added two new features for better game control:

1. Show Match Score Setting:
   - Added showMatchScore boolean to Settings type (default: true)
   - Added toggle in SettingsDialog to control score visibility
   - Players.tsx now respects the setting when passing matchScore
   - Users can hide score badges in 1v1 games if desired

2. Forfeit Button in Player Menu:
   - Added Skull icon import to PlayerMenu
   - Added onForfeit optional prop to PlayerMenu
   - Added red skull button in player menu buttons section
   - LifeCounter passes forfeit handler (toggleGameLost) to menu
   - Only shows when player can lose (life ≤ 0 or poison/commander damage)
   - Allows players to forfeit game from their individual menu

Both features improve user control over the match scoring system.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

src/Components/LifeCounter/LifeCounter.tsx

@@ -268,6 +268,7 @@ const LifeCounter = ({ player, opponents, matchScore }: LifeCounterProps) => {
           isShown={showPlayerMenu}
           player={player}
           setShowPlayerMenu={setShowPlayerMenu}
+          onForfeit={playerCanLose(player) ? toggleGameLost : undefined}
         />
       </LifeCounterWrapper>
     </LifeCounterContentWrapper>