port: PythonItem + item module (batch 2 P3-b)

Verbatim 40250 CPythonItem and the item Python module replace the
pending stand-in and the module stub; CPythonApplication::Create calls
m_pyItem.Create() in 40250 order. itemGetIconImage returns its handle
through Py_BuildPointer (the ILP32 int truncated it and wndMgr.SetSlot
crashed on the live inventory). CMapManager::GetNormal evaluates
CTerrain::CalculateNormal on the native height tile; the item text-tail
members stay stubs, Pick answering -1 like an empty tail map.

The fake server drops vnum 19 next to the actor at entergame and answers
CG_ITEM_PICKUP with GC_ITEM_GROUND_DEL; login_flow picks it up through
player.PickCloseItem and checks item.SelectItem(19).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

audit/port-map/GameLib/MapManager.cpp.json

@@ -179,7 +179,12 @@
       "status": "TODO"
     },
     "CMapManager::GetNormal": {
-      "status": "TODO"
+      "status": "ADAPTED",
+      "impl": [
+        "extension/src/platform/pending/GameLib/MapManager.cpp:CMapManager::GetNormal"
+      ],
+      "test": "extension/tests/port_login_flow_test.cpp (port.login_flow: ground item vnum 19 add/ownership/PickCloseItem/GROUND_DEL; item.SelectItem(19))",
+      "note": "CMapOutdoor::GetNormal tile clamp + CTerrain::CalculateNormal formula evaluated per call on the native height tile (no m_acNormalMap until CMapOutdoor/CTerrain are ported)."
     },
     "CMapManager::isPhysicalCollision": {
       "status": "TODO"