🚩(frontend) feature flag on blocking edition

If users were not connected to the collaboration
server, they were not be able to edit documents.

We decided to add a feature flag on this feature
as it can be quite restrictive.
We can now enable or disable this feature at runtime
thanks to the env variable
"COLLABORATION_WS_NOT_CONNECTED_READY_ONLY".

src/frontend/apps/e2e/__tests__/app-impress/common.ts

@@ -4,6 +4,7 @@ export const CONFIG = {
   AI_FEATURE_ENABLED: true,
   CRISP_WEBSITE_ID: null,
   COLLABORATION_WS_URL: 'ws://localhost:4444/collaboration/ws/',
+  COLLABORATION_WS_NOT_CONNECTED_READY_ONLY: false,
   ENVIRONMENT: 'development',
   FRONTEND_CSS_URL: null,
   FRONTEND_HOMEPAGE_FEATURE_ENABLED: true,

src/frontend/apps/e2e/__tests__/app-impress/doc-editor.spec.ts

@@ -516,6 +516,7 @@ test.describe('Doc Editor', () => {
           json: {
             ...CONFIG,
             COLLABORATION_WS_URL: 'ws://localhost:5555/collaboration/ws/',
+            COLLABORATION_WS_NOT_CONNECTED_READY_ONLY: true,
           },
         });
       } else {