Expand grid size limits for larger, detailed maps

I’m currently creating a large map and using hex grids to manage travel distances. However, the current grid size limit of 256x162 is too restrictive for my needs. While increasing the map size could technically accommodate larger grids, doing so introduces significant performance issues when rendering at 8K resolution.

Proposed Solution:

Allow larger grid sizes independent of map dimensions, enabling larger grid sizes without compromising memory or rendering efficiency.

This feature would enhance usability for creators working on complex, large-scale maps.