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/sunrise/kuka/features/io-group.en.md

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+# IO Group menu
+
+The **I/O groups** section provides monitoring and manual control of digital input/output signals configured in the Sunrise project. Open it from the smartHMI navigation bar.
+
+## Available groups
+
+Click **I/O groups** in the navigation bar to open the list of available groups. This project defines the following groups:
+
+![I/O group list](../../assets/kuka/io-group/main.jpg)
+
+| Group | Description |
+|---|---|
+| FRI | FRI (Fast Robot Interface) signal group |
+| IO_group | Custom digital input/output group |
+
+## Viewing signals
+
+Selecting a group opens a page containing all of its signals.
+
+![Controlling output signals](../../assets/kuka/io-group/output.jpg)
+
+### Signal table structure
+
+| Column | Description |
+|---|---|
+| Input / Output | Signal direction icon |
+| Name | Signal name, such as `In_1` or `Out_16` |
+| Type | Signal type; digital Boolean for this group |
+| Value | Current signal state (`0` / `1`) |
+
+## Controlling output signals
+
+For signals whose direction is **Output**, the lower panel provides buttons that force a value:
+
+| Button | Action |
+|---|---|
+| True | Set the output signal to `1` (active) |
+| False | Set the output signal to `0` (inactive) |
+
+!!! note
+    **Input** signals are read-only.