feat: add release-to-move TCP gizmo control in Webots

Add a native Webots marker for setting the active tool's TCP position and
orientation. Dragging edits the preview; releasing the mouse submits one
complete, checked joint trajectory with configured TCP speed limits.
Unreachable targets reset the marker to the current TCP.

Preserve coordinate, joint, and control-file commands through motion
reservations and a controller action proxy. Give the gizmo lowest priority
and finish its committed trajectory before dispatching queued regular
commands, including waits longer than the former two-second service timeout.

Place the patron TCP at its working end, 55.2 mm along local Z, and use the
flange TCP when no tool is attached. Add digital_twin.tcp_gizmo configuration,
ROS interfaces, launch integration, and regression coverage.

Document operation, configuration, tool attachment, speed limits, and
troubleshooting in both Russian and English.

Validation: 42 Python tests and 8 C++ tests passed. Webots regressions covered
one action per release, translation and rotation with and without a tool,
unreachable targets, and ordinary commands waiting for gizmo completion.

src/iiwa_bringup/launch/supported/moveit_nodes.py

@@ -1,5 +1,6 @@
 from launch_ros.actions import Node
 from moveit_configs_utils import MoveItConfigsBuilder
+from .tcp_gizmo_nodes import make_tcp_gizmo_nodes
 
 
 def make_moveit_nodes(settings, robot_description: str, use_sim_time: bool):
@@ -46,8 +47,9 @@ def make_moveit_nodes(settings, robot_description: str, use_sim_time: bool):
                 "default_frame": settings.planning.default_frame,
                 "default_planner": settings.planning.default_planner,
                 "planning_attempts": settings.planning.planning_attempts,
+                "tcp_gizmo_enabled": use_sim_time and settings.digital_twin.tcp_gizmo.enabled,
             },
         ],
     )
 
-    return moveit_configs, [move_group, move_to_pose_server]
+    return moveit_configs, [move_group, move_to_pose_server, *make_tcp_gizmo_nodes(settings, common_params, use_sim_time)]