Fix documentation build system - resolve becca module instance issue

Fixed the issue where multiple becca instances were being created due to inconsistent module import paths. The solution was to export becca from becca_loader and access it from there, ensuring a single instance is used throughout the build process.

Co-authored-by: eliandoran <21236836+eliandoran@users.noreply.github.com>

apps/server/src/becca/becca_loader.ts

@@ -293,5 +293,6 @@ eventService.subscribeBeccaLoader(eventService.LEAVE_PROTECTED_SESSION, load);
 export default {
     load,
     reload,
-    beccaLoaded
+    beccaLoaded,
+    becca
 };