Added warning for unsupported Python versions (<3.8)

[Samayeeta]

Description

Added a Python version check to create_cli.py to ensure users are running Python 3.8 or higher. If the version is lower, a warning message is displayed in red.

Changes to be made

Modify create_cli.py to check sys.version_info and display a warning if the version is below 3.8. The warning message is formatted in red for better visibility.

Status

The Python version check has been implemented and tested. The warning message appears correctly for Python versions below 3.8.

To do

• Review the changes for any potential improvements.
• Merge the PR once approved.

Is this pull request related to any open issue? If yes, replace issueID below with the issue ID

Related to #1501

[DhanshreeA]

Hi @Samayeeta we already have a strong PR opened for this issue. I will deprioritise this PR for now. Thank you for taking interest in contributing to Ersilia.

[Samayeeta]

Thank you for taking the time to review my pull request and for letting me know about the existing PR on this issue. I appreciate your feedback and understand the decision to prioritize the stronger PR. If you have any suggestions or specific feedback on my approach, I’d be happy to learn from it for future contributions.