feat: add support for calendar without integrations, add today mark (#2016)

* feat: add support for calendar without integrations, add today mark

* fix: ci issues

apps/nextjs/src/components/board/items/item-content.tsx

@@ -79,7 +79,13 @@ const InnerContent = ({ item, ...dimensions }: InnerContentProps) => {
         >
           <Throw
             error={new NoIntegrationSelectedError()}
-            when={widgetSupportsIntegrations && item.integrationIds.length === 0}
+            when={
+              widgetSupportsIntegrations &&
+              item.integrationIds.length === 0 &&
+              "integrationsRequired" in definition &&
+              // eslint-disable-next-line @typescript-eslint/no-unnecessary-condition
+              definition.integrationsRequired !== false
+            }
           />
           <BoardItemMenu offset={4} item={newItem} />
           <Comp