feat: New Assistants Edit Page (#11920)

# Pull Request Template

## Description

Fixes https://linear.app/chatwoot/issue/CW-4602/assistants-edit-page

### Screenshots
<img width="1650" height="890" alt="image"
src="https://github.com/user-attachments/assets/f9834cd3-9cf3-4173-8d33-1aad04d8991e"
/>
<img width="1650" height="890" alt="image"
src="https://github.com/user-attachments/assets/a628328a-fdfd-4ee7-86b5-2a1945e0c114"
/>

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Co-authored-by: Muhsin Keloth <muhsinkeramam@gmail.com>

config/features.yml

@@ -176,3 +176,7 @@
 - name: notion_integration
   display_name: Notion Integration
   enabled: false
+- name: captain_integration_v2
+  display_name: Captain V2
+  enabled: false
+  premium: true