feat(maptool): add vector tile generation from WRP terrain data#134
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Parse OPRW v24/25 WRP files to extract elevation, building objects, and road networks, then generate vector.pmtiles via tippecanoe. The pipeline produces contour lines (marching squares), building point features, and road polylines as separate vector tile layers. Key implementation details: - Full WRP binary parser with QuadTree, LZO decompression, and section navigation using LZO end-of-stream markers to handle go-lzo's bufio overread - Contour generation via marching squares algorithm at configurable intervals (10m minor, 50m major) - Style.json updated with vector layers when vector.pmtiles exists - Vector tile stage is optional (skips gracefully if tippecanoe missing or WRP parsing fails)
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Summary
Key implementation details
Test plan