wzapi::hackTextMarker - Place colored text marker on map

[1269339743]

Place text on map is useful for AI debugging or tutorial.
It use same palette of player colour.

effect:

subtract playerPos.p.x % TILE_WIDTH ... for better sub-tile precision (mp4 video):
before:
https://github.com/user-attachments/assets/416ee2b4-7020-4e98-8d71-7096888f9439
after:
https://github.com/user-attachments/assets/a8c63624-4795-4bf0-b34a-1e623f17c513

[1269339743]

Mod to test hackTextMarker
Phase 0: Place marker on tile under droid
Phase 1: Place marker on droid
Switch between Phase 0 and Phase 1 every 10s

hackTextMarker.zip

[past-due]

@1269339743 When testing these changes, I noticed that locateMouse() was returning less accurate values, and thus the mouse tile coordinates were noticeably "off" in many cases.

I've pulled out the sub-tile change to #4322 and incorporated a draft fix to screenCoordToWorld - please let me know your thoughts (there may be a better approach, this was a very quick attempt at a fix).

For testing: I find that these scavenger buildings near the starting position on "Fastplay" mode are a good place to find issues.

[1269339743]

I forgot to add relative code, my incomplete fix caused bug

Current code search in a continuous array, it probably gained some speed from CPU cache
Index colour O(1) or Quadtree O(log2(n)) can be faster, but need lot of math and coding
Since there is only one mouse and the function called once per frame, current code should work well