Add documentation for KUKA Sunrise features and programs

- Created a new document for the Station interface, detailing its menu structure, process data, safety functions, frames, and smartPAD function buttons.
- Added a document for RobotPowerControl, explaining its purpose for safely shutting down or restarting the KUKA Sunrise Cabinet controller.
- Introduced ServerFriRos2 documentation, outlining its role in establishing an FRI connection between the KUKA LBR iiwa and a ROS 2 computer.
- Documented the TeachKuka application, which allows manual teaching of the KUKA LBR iiwa, including position capturing and trajectory recording.
- Added an overview of Sunrise Workbench, including installation instructions for Windows and Linux.
- Created a section on installing a Windows compatibility tool (PortProton) on Linux.
- Documented the installation process for SunriseWorkbench on Linux using PortProton.
- Added installation instructions for SunriseWorkbench on Windows.
- Created troubleshooting documentation for configuration errors and SSL errors during installation.
- Implemented a hook to generate the shared PDF only during the default-language build.

doc/lwc-doc/docs/getting-started/concepts/simulation.en.md

@@ -0,0 +1,18 @@
+# Simulation (Webots)
+
+!!! info "Work in progress"
+    A detailed simulator guide is being prepared.
+
+**Webots** is an open-source robot simulator. LWC uses it as a digital twin of the KUKA LBR IIWA 7, allowing control algorithms to be developed and debugged without a physical robot.
+
+## Key features
+
+- The simulator uses the same ROS 2 topics and interfaces as the real robot.
+- The simulation world is set in `cobot-setting.yaml` → `digital_twin.webots.world`.
+- Start it with `cobot run --simulate`.
+
+## Differences from the real robot
+
+- There are no real safety constraints, so motion can be faster.
+- Physics is approximate, including inertia, friction, and elasticity.
+- FRI is not used; communication goes through the Webots ROS 2 driver.