feat: add autobordering brush system ported from otacademy

- BrushDatabase with AutoBorder, GroundBrush, and BorderBlock models
- XML parser for borders.xml and grounds.xml data files
- border_types[256] lookup table for neighbour bitmask resolution
- ComputeBorders algorithm with 8-neighbour sampling and z-order sorting
- Borderize method for automatic border recalculation on tile changes
- Include borders.xml and grounds.xml data files for protocol 1098

Author: BrewertonSantos