Create Feature Flag for Style Editor for traditional pages

[KevinDavilaDotCMS]

Description

Implement a FF to work the new feature "Style Editor for Traditional Pages"

Acceptance Criteria

• The new Style Editor for traditional pages only works if the FF is on

Priority

Medium

Additional Context

No response

[github-actions]

PRs linked to this issue

• Implemented new FF Style Editor for traditional pages by @KevinDavilaDotCMS