fix: Add clearArea handler and Lua binding (Map Change Clear Cache)

[jprzimba]

This is a possible solution for map switching on the server, especially on the Soul War map where switching happens frequently.
It was discovered that ebb and flow is a major memory leak.
With each loadMap, setBasicTile only overwrites tiles that exist in the new OTBM. Tiles that were in the previous map but are not in the new one remain in the Floor cache (shared_ptr), accumulating. After many swaps, thousands of orphaned shared_ptr pointing to old BasicTile objects are retained.

• Implement Map::clearArea to clear tiles (and tile cache) in a rectangular XYZ region and forward it via Game::clearArea.
• Expose the functionality to scripts as Game.clearArea Lua method (dispatched on the game thread).
• Also fix a typo in soul_war_mechanics.lua referencing SoulWarQuest.ebbAndFlow.mapsPath.
• Changes touch map, game and Lua binding headers/implementations.

NOTE: This isn't 100% yet, but we're running tests to see how it behaves during the time the server is online. This PR is subject to change.

[Sh3Ns]

Testei o ebb and flow do Soul War com múltiplas trocas de mapa e tudo funcionando perfeitamente. Nenhum problema identificado até o momento. ✅

[github-actions]

This PR is stale because it has been open 45 days with no activity.