fix(python): expose carla.command namespace on ue5 module layout (#9634 PR #0u) (#9775)

* fix(python): expose carla.command namespace on ue5 module layout

The ue5-dev wheel installs `carla` as a single extension module
(carla.cpython-*.so), not a package, so PythonAPI/carla/__init__.py is
never executed at import time. Registering the command submodule as
"carla.command" via PyImport_AddModule places it directly in
sys.modules, which makes `from carla.command import ...` work without
any __init__.py shim. Verified: from carla.command import SpawnActor,
DestroyActor; carla.command.SpawnActor.__module__ == 'carla.command'.

Signed-off-by: Yutaka Kondo <yutaka.kondo@youtalk.jp>

* docs(changelog): note carla.command namespace fix

Signed-off-by: Yutaka Kondo <yutaka.kondo@youtalk.jp>

---------

Signed-off-by: Yutaka Kondo <yutaka.kondo@youtalk.jp>

Author: youtalk

CHANGELOG.md

@@ -1,5 +1,6 @@
 ## LATEST Changes
 
+* Fixed `from carla.command import ...` on the Python API by registering the `command` submodule under `carla.command` in `sys.modules` (the ue5 wheel ships `carla` as a bare extension module, so the previous `libcarla.command` namespace was not importable).
 * Modernized the Python navigation agents with type hints and code cleanup ported from `ue4-dev`, added typed obstacle/traffic-light detection-result tuples in `agents/tools/hints.py`, reworked `BasicAgent.set_destination` to accept an optional start location and queue-clean flag, and fixed obstacle detection treating an empty `vehicle_list` as "all vehicles".
 * Updated the `invertedai_traffic.py` example with InvertedAI quality-of-life improvements for ego-vehicle integration and video generation.
 * Added fisheye camera sensors (`sensor.camera.rgb_fisheye`, `sensor.camera.depth_fisheye`, `sensor.camera.semantic_segmentation_fisheye`, `sensor.camera.instance_segmentation_fisheye`) using the Kannala-Brandt projection model. Each variant captures up to 6 cubemap face render targets (the back face is skipped unless the FOV or equirectangular mode requires it) and composites them through a custom HLSL shader (`Plugins/Carla/Shaders/WideAngleLens.usf`) using configurable distortion coefficients. See `PythonAPI/examples/manual_control_fisheye.py` for an interactive demo. Ported from ue4-dev.

PythonAPI/carla/src/Commands.cpp

@@ -50,7 +50,7 @@ void export_commands() {
 
   using ActorPtr = carla::SharedPtr<cc::Actor>;
 
-  object command_module(handle<>(borrowed(PyImport_AddModule("libcarla.command"))));
+  object command_module(handle<>(borrowed(PyImport_AddModule("carla.command"))));
   scope().attr("command") = command_module;
   scope submodule_scope = command_module;