Improve Content Localization settings landing page with summary or redirect

[sebastienros]

Description

The Content Localization settings page (/Admin/Settings/ContentLocalization) appears mostly empty with just a "Save" button. The actual localization settings are nested under sub-menus (Content Culture, Content Culture Picker, Cultures), making the main page confusing.

Current Behavior

1. User navigates to Settings > Localization
2. User sees the Content Localization page with minimal content (just a Save button)
3. User must discover the sub-menu items to find actual settings

Expected Behavior

The landing page should either provide useful information or redirect to the most relevant settings page.

Suggested Improvements

Option A: Dashboard/Summary view

• Show a summary of current localization configuration:
  • Supported cultures list
  • Number of content types with LocalizationPart
  • Quick stats on localized content
• Include quick links to common actions

Option B: Redirect to most useful page

• Automatically redirect to the "Cultures" settings page (most commonly needed)
• Or redirect to a "Getting Started with Localization" page

Option C: Combined settings page

• Consolidate the sub-menu settings (Content Culture, Content Culture Picker, Cultures) into a single tabbed interface on the main page
• Reduce navigation depth

Option D: Help/guidance content

• If the page must remain minimal, add helpful text explaining:
  • What each sub-menu option does
  • Recommended setup steps
  • Links to documentation

Impact

This would reduce confusion for users configuring localization settings for the first time.

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