Feature Request - Add toggleable mapsquare ("chunk") boundary overlay

[BobbyHill7]

Similar to the overlays allowed within the ::debug mode, it would be nice if a new command was added to show an overlay of where the mapsquare boundaries exist. I spent about 5 hours attempting to add this in a local build, but being unfamiliar with 2d drawing and managing player position, map position, and bit shifting, I was wholly unsuccessful. I was attempting to use the drawTileOverlay function to add a red border along the mapsquare boundaries similar to this:

For some context, I'm looking for something similar to this OSRS Runelite plugin: https://github.com/slaytostay/region-locker/blob/master/src/main/java/com/regionlocker/RegionBorderOverlay.java

This would be used for a new 2004Scape chunkman series on my YouTube channel: https://www.youtube.com/@BrewScape