Add createSite feature so user can disable site creation #813 (#814)

Co-authored-by: Florent FAYOLLE <florent.fayolle@beta.gouv.fr>

app/client/ui/SiteSwitcher.ts

@@ -42,12 +42,14 @@ export function buildSiteSwitcher(appModel: AppModel) {
         testId('org'),
       )
     ),
-    menuItem(
-      () => appModel.showNewSiteModal(),
-      menuIcon('Plus'),
-      t("Create new team site"),
-      testId('create-new-site'),
-    ),
+    dom.maybe(() => isFeatureEnabled("createSite"), () => [
+      menuItem(
+        () => appModel.showNewSiteModal(),
+        menuIcon('Plus'),
+        t("Create new team site"),
+        testId('create-new-site'),
+      )
+    ]),
   ];
 }
 

app/common/gristUrls.ts

@@ -758,6 +758,7 @@ export const Features = StringUnion(
   "helpCenter",
   "billing",
   "templates",
+  "createSite",
   "multiSite",
   "multiAccounts",
   "sendToDrive",