feat: App mode enter builder menu item (#9341)

## Summary

Adds enter builder menu item for easier access to app builder. 
Fixes issues with seen item tracking

## Changes

- **What**: 
- add enter builder menu item
- change non visible items to still be returned as part of the array, so
they are not incorrectly removed from the seen-items tracking
- split toggle-app-mode into two stable items

## Screenshots (if applicable)

<img width="309" height="526" alt="image"
src="https://github.com/user-attachments/assets/69affc2c-34ab-45eb-b47b-efacb8a20b99"
/>

┆Issue is synchronized with this [Notion
page](https://www.notion.so/PR-9341-feat-App-mode-enter-builder-menu-item-3176d73d365081a9a7e7cf1a1986354f)
by [Unito](https://www.unito.io)

src/locales/en/main.json

@@ -2589,6 +2589,7 @@
     "duplicate": "Duplicate",
     "enterAppMode": "Enter app mode",
     "exitAppMode": "Exit app mode",
+    "enterBuilderMode": "Enter app builder",
     "workflowActions": "Workflow actions",
     "clearWorkflow": "Clear Workflow",
     "deleteWorkflow": "Delete Workflow",