🧐(frontend) dispatch the app version to posthog

We add the app version in Posthog events to be
able to track which versions are being used and
identify potential issues related to specific
versions.

src/frontend/apps/impress/src/services/PosthogAnalytic.tsx

@@ -60,6 +60,12 @@ export function PostHogProvider({
         if (process.env.NODE_ENV === 'development') {
           posthogInstance.debug();
         }
+
+        if (process.env.NEXT_PUBLIC_APP_VERSION) {
+          posthogInstance.register({
+            app_version: process.env.NEXT_PUBLIC_APP_VERSION,
+          });
+        }
       },
       capture_pageview: false,
       capture_pageleave: true,