Add Missing Flex Container in Flexbox Visualizer

[imran-khani]

There is a missing flex container that needs to be incorporated into the Flexbox visualizer to ensure a comprehensive representation of various Flexbox layout scenarios.

Changes Proposed:

1. HTML Addition:
   • Inclusion of the missing flex container structure within the relevant section of the visualizer.

Purpose:
The addition of this missing flex container is crucial to offer users a complete understanding of different Flexbox layout configurations within the visualizer.

Requested Review Focus:
Please review the incorporation of the missing flex container. Ensure its seamless integration within the existing visualizer structure and check for any necessary adjustments in CSS to maintain consistent styling.