- Added `skirmish_decks.json` with 8 premade decks across difficulty levels (Easy to Legendary)
- Implemented `SkirmishDeckSelectScene` for choosing player/opponent decks (draft or premade)
- Implemented `SkirmishDraftScene` with interactive card drafting, budget system, and AI opponent deck generation
- Updated `BattleScene` to support skirmish mode with custom decks and gold rewards (200/400)
- Updated `BattleResultScene` to return players to SkirmishSetup for quick replay
- Integrated new scenes into game flow via config and BootScene data loading
