chore: complete sprite regeneration for remaining 14 blueprint fixtures

Regenerated sprite sheets for all remaining blueprint files:
- bases (1458 entries)
- cave (210 entries)
- cut-stone (811 entries)
- cut-stone_ruined (107 entries)
- dungeon_stone (2777 entries, 19 deprecated removed)
- dungeon_stone_ruined (268 entries)
- dwarven_halls (77 entries)
- encounters (53 entries)
- mines (80 entries)
- rough_stone (147 entries)
- rough_stone_ruined (314 entries)
- sewers (45 entries)
- streets (152 entries)
- towne (662 entries)

All 19 blueprint fixture files now have complete sprite metadata.
Total entries with sprite coverage: ~7,000+ entries.
All deprecated entries removed from full scans.

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

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

Author: devonjones