q2pro_841df7b

Add mm_carryover cvar for matchmode score carryover across maps (#309)

* Add mm_carryover cvar for matchmode score carryover across maps

Allows team scores (t1/t2/t3) from map 1 to persist into map 2 in
matchmode multi-map matches. Scores are stored in game_locals_t which
survives map changes. Carryover auto-clears after map 2. Stat logging
subtracts carried-over scores for accurate per-map statistics.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

* Removed .DS_Store

* Auto reset scores on carry over

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Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>