feat: Upgrade prompt for help center (#8010)

Co-authored-by: Sojan Jose <sojan@pepalo.com>
Co-authored-by: Pranav Raj S <pranav@chatwoot.com>

app/javascript/dashboard/components/layout/Sidebar.vue

@@ -11,7 +11,6 @@
       @key-shortcut-modal="toggleKeyShortcutModal"
       @open-notification-panel="openNotificationPanel"
     />
-
     <secondary-sidebar
       v-if="showSecondarySidebar"
       :class="sidebarClassName"
@@ -114,7 +113,12 @@ export default {
         if (!isAvailableForTheUser) {
           return false;
         }
-
+        if (
+          menuItem.alwaysVisibleOnChatwootInstances &&
+          !this.isACustomBrandedInstance
+        ) {
+          return true;
+        }
         if (menuItem.featureFlag) {
           return this.isFeatureEnabledonAccount(
             this.accountId,

app/javascript/dashboard/components/layout/config/sidebarItems/primaryMenu.js

@@ -42,6 +42,7 @@ const primaryMenuItems = accountId => [
     key: 'helpcenter',
     label: 'HELP_CENTER.TITLE',
     featureFlag: FEATURE_FLAGS.HELP_CENTER,
+    alwaysVisibleOnChatwootInstances: true,
     toState: frontendURL(`accounts/${accountId}/portals`),
     toStateName: 'default_portal_articles',
     roles: ['administrator'],