Improve the convenience of the Admin navigation menu

[fenbox]

Is your enhancement request related to a problem? Please describe

The current backend menu functions are scattered, with settings for the same objects distributed across different menus, making it difficult to find.

Describe the solution you'd like

The content and settings of the same function are grouped together.

• Dashboard
• Contents
  • Questions: Put the questions and answers all here
    • Questions
    • Answers
    • Settings: Question and Answer Settings
  • Tags: New menu
    • Settings：Tag-related settings
• Intelligence
  • AI Setting
  • AI Assistant
  • MCP
• Community
  • Users
    • Users
    • Settings: User-related settings
  • Badges
    • Badges
  • Rules
    • Privileges
    • Policies
• Appearance
  • Themes
  • Customize
  • Branding
  • Interface
• Advanced
  • General: Some forms removed
  • Security: Newly added, some forms moved here
  • Files
  • Login
  • SEO
  • SMTP
  • API Keys
• Plugins