Add isaaclab_ovphysx.sensors.ray_caster package

Mirror the per-backend RayCaster structure introduced by PR isaac-sim#5510 for
the OVPhysX backend: a single ``_OvPhysxRayCasterMixin`` (~200 lines)
in ``ray_caster.py`` carries the backend-specific pose-tracking
surface, reading live body poses through the ovphysx wheel's
``create_tensor_binding(pattern=..., tensor_type=RIGID_BODY_POSE)``
API. Three 14-line sibling modules compose the mixin with the matching
``Base*`` class (RayCasterCamera, MultiMeshRayCaster,
MultiMeshRayCasterCamera).

Static (non-physics) sensor frames fall back to a one-time USD pose
snapshot, matching PhysX's ``_initialize_static_pose_tracking``. Under
OVPhysX ``clone_usd=True`` scenes where only env_0 carries USD prims,
the env_0 offset is broadcast across the binding's row count (same
broadcast PhysX applies).

Multi-mesh dynamic targets create a second binding via the same
``create_tensor_binding`` call. v1 limitation: target paths must dedup
to a single env-wildcard pattern; multi-pattern targets raise
``NotImplementedError`` (mirrors the OVPhysX ContactSensor
``track_pose`` single-body constraint).

Unblocks ``Isaac-Velocity-Rough-Anymal-D-v0 presets=ovphysx`` (the
height_scanner is a RayCaster).

Author: AntoineRichard

source/isaaclab_ovphysx/changelog.d/ovphysx-raycaster.minor.rst

@@ -0,0 +1,15 @@
+Added
+^^^^^
+
+* Added :mod:`isaaclab_ovphysx.sensors.ray_caster` with
+  :class:`~isaaclab_ovphysx.sensors.ray_caster.RayCaster`,
+  :class:`~isaaclab_ovphysx.sensors.ray_caster.RayCasterCamera`,
+  :class:`~isaaclab_ovphysx.sensors.ray_caster.MultiMeshRayCaster`, and
+  :class:`~isaaclab_ovphysx.sensors.ray_caster.MultiMeshRayCasterCamera`.
+  Mirrors :mod:`isaaclab_physx.sensors.ray_caster` structure: a single
+  ``_OvPhysxRayCasterMixin`` carries the backend-specific pose-tracking
+  surface, reading body poses via the ovphysx
+  ``create_tensor_binding(pattern=..., tensor_type=RIGID_BODY_POSE)``
+  API. Static (non-physics) sensor frames fall back to a one-time USD
+  pose snapshot. Unblocks ``Isaac-Velocity-Rough-Anymal-D-v0`` (the
+  height_scanner now dispatches under OVPhysX).

source/isaaclab_ovphysx/isaaclab_ovphysx/sensors/ray_caster/__init__.py

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+# Copyright (c) 2022-2026, The Isaac Lab Project Developers (https://github.com/isaac-sim/IsaacLab/blob/main/CONTRIBUTORS.md).
+# All rights reserved.
+#
+# SPDX-License-Identifier: BSD-3-Clause
+
+"""Sub-module for OVPhysX ray-caster sensors."""
+
+from isaaclab.utils.module import lazy_export
+
+lazy_export()

source/isaaclab_ovphysx/isaaclab_ovphysx/sensors/ray_caster/__init__.pyi

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+# Copyright (c) 2022-2026, The Isaac Lab Project Developers (https://github.com/isaac-sim/IsaacLab/blob/main/CONTRIBUTORS.md).
+# All rights reserved.
+#
+# SPDX-License-Identifier: BSD-3-Clause
+
+__all__ = [
+    "MultiMeshRayCaster",
+    "MultiMeshRayCasterCamera",
+    "RayCaster",
+    "RayCasterCamera",
+]
+
+from .multi_mesh_ray_caster import MultiMeshRayCaster
+from .multi_mesh_ray_caster_camera import MultiMeshRayCasterCamera
+from .ray_caster import RayCaster
+from .ray_caster_camera import RayCasterCamera

source/isaaclab_ovphysx/isaaclab_ovphysx/sensors/ray_caster/multi_mesh_ray_caster.py

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+# Copyright (c) 2022-2026, The Isaac Lab Project Developers (https://github.com/isaac-sim/IsaacLab/blob/main/CONTRIBUTORS.md).
+# All rights reserved.
+#
+# SPDX-License-Identifier: BSD-3-Clause
+
+from __future__ import annotations
+
+from isaaclab.sensors.ray_caster.base_multi_mesh_ray_caster import BaseMultiMeshRayCaster
+
+from .ray_caster import _OvPhysxRayCasterMixin
+
+
+class MultiMeshRayCaster(_OvPhysxRayCasterMixin, BaseMultiMeshRayCaster):
+    """OVPhysX MultiMeshRayCaster implementation."""

source/isaaclab_ovphysx/isaaclab_ovphysx/sensors/ray_caster/multi_mesh_ray_caster_camera.py

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+# Copyright (c) 2022-2026, The Isaac Lab Project Developers (https://github.com/isaac-sim/IsaacLab/blob/main/CONTRIBUTORS.md).
+# All rights reserved.
+#
+# SPDX-License-Identifier: BSD-3-Clause
+
+from __future__ import annotations
+
+from isaaclab.sensors.ray_caster.base_multi_mesh_ray_caster_camera import BaseMultiMeshRayCasterCamera
+
+from .ray_caster import _OvPhysxRayCasterMixin
+
+
+class MultiMeshRayCasterCamera(_OvPhysxRayCasterMixin, BaseMultiMeshRayCasterCamera):
+    """OVPhysX MultiMeshRayCasterCamera implementation."""