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/assets/pdf_button.js

@@ -1,9 +1,12 @@
 document.addEventListener("DOMContentLoaded", function () {
   const siteRoot = document.querySelector('meta[name="site-root"]')?.content ?? "";
+  const isEnglish = document.documentElement.lang.toLowerCase().startsWith("en");
   const btn = document.createElement("a");
   btn.href = siteRoot + "/pdf/documentation.pdf";
   btn.download = "lwc-documentation.pdf";
-  btn.title = "Скачать всю документацию в PDF";
+  btn.title = isEnglish
+    ? "Download all documentation as PDF"
+    : "Скачать всю документацию в PDF";
   btn.style.cssText = [
     "position: fixed",
     "bottom: 80px",
@@ -22,7 +25,7 @@ document.addEventListener("DOMContentLoaded", function () {
     "gap: 8px",
     "transition: opacity .2s",
   ].join(";");
-  btn.innerHTML = "📄 Скачать PDF";
+  btn.innerHTML = isEnglish ? "📄 Download PDF" : "📄 Скачать PDF";
   btn.onmouseenter = () => (btn.style.opacity = "0.85");
   btn.onmouseleave = () => (btn.style.opacity = "1");
   document.body.appendChild(btn);