[JasperGeurtz]

Summary

This PR fixes several behavioral discrepancies and bugs in JBWAPI, found using ChatGPT.

Changes

• BuildingPlacer

  • Fix the starting position calculation when reserving existing addon placement locations.
  • Correct structure reservation padding for factories, missile turrets, robotics facilities, gateways, and photon cannons.

• Game

  • Fix getUnitsOnTile() to return units whose bounding boxes intersect the specified tile, rather than only units whose top-left tile matches it.
  • Fix getUnitsInRadius() to use unit-to-position distance instead of approximate center-to-center distance.
  • Handle empty map filenames safely in setMap().

• Player

  • Correct the purple text color comment and fix the green color mapping.

• Unit

  • Correct the weapon target filtering logic in getUnitsInWeaponRange().
  • Fix the path check in canGather() to check the target unit's position.
  • Fix the enemy-player comparison in the healing tech check in canUseTechUnit().

• UnitFilter

  • Introduce the correctly spelled IsTransport filter while retaining IsTransPort as a deprecated alias for backward compatibility.

[dgant]

Looks good!