Children regions and area element

[gabrielcsilva1]

Add Area and Subregion Generation

This change adds support for subregion and area element generation in NCL documents.

Changes

Fixes

• Fixed import errors between modules.
• Fixed issues with macro generation in specific scenarios.
• Updated function calls to use the correct implementations.

New features

• Subregion generation has been implemented.

region screen
  region header
    width: "100%"
    height: "5%"
  end
end

• Added support for area generation within media elements

media animation
  src: "assets/animation.mp4"
  area segAudio
    begin: "5s"
  end
end