FTM: New UVE Toolbar - Implement Language selector

[KevinDavilaDotCMS]

Parent Issue

#30598

Task

Adapt the existing Language Selector component for the new UVE Toolbar, maintaining its current functionality and interactions. This task involves adapting the newWithEditorToolbar()

Proposed Objective

Successfully integrate the Language Selector into the new toolba while preserving all existing functionality across both traditional and headless pages.

Acceptance Criteria

• Ensure all existing Language Selector functionality remains intact:
  • Language switching
  • Language list display
  • Current language indication
• Verify the component works correctly in both traditional and headless pages.
• Maintain backwards compatibility so the old design continues to work in other parts of the application.