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.

rosdep.yaml

@@ -18,3 +18,22 @@ python3-fastmcp:
     pip:
       packages: [fastmcp]
 
+# TCP gizmo / MoveIt Servo (ROS 2 Jazzy).
+moveit_servo:
+  ubuntu: [ros-jazzy-moveit-servo]
+rclcpp_action:
+  ubuntu: [ros-jazzy-rclcpp-action]
+control_msgs:
+  ubuntu: [ros-jazzy-control-msgs]
+trajectory_msgs:
+  ubuntu: [ros-jazzy-trajectory-msgs]
+action_msgs:
+  ubuntu: [ros-jazzy-action-msgs]
+rcl_interfaces:
+  ubuntu: [ros-jazzy-rcl-interfaces]
+tf2_eigen:
+  ubuntu: [ros-jazzy-tf2-eigen]
+python3-numpy:
+  ubuntu: [python3-numpy]
+python3-scipy:
+  ubuntu: [python3-scipy]