Added MainBranch filed in project show cmmand(AST-112979)

[cx-sumit-morchhale]

By submitting this pull request, you agree to the terms within the Checkmarx Code of Conduct. Please review the contributing guidelines for guidance on creating high-quality pull requests.

Description

returning MainBranch when using AST CLI Project Show Command

Type of Change

• New feature (non-breaking change which adds functionality)

Related Issues

Link any related issues or tickets.

Checklist

• I have performed a self-review of my code
• I have added tests that prove my fix is effective or that my feature works
• I have added necessary documentation (if appropriate)
• Any dependent changes have been merged and published in downstream modules
• I have updated the CLI help for new/changed functionality in this PR (if applicable)
• All active GitHub checks for tests, formatting, and security are passing
• The correct base branch is being used

Screenshots (if applicable)

Add screenshots to help explain your changes.

Additional Notes

Add any other relevant information.

[github-actions]

Checkmarx One – Scan Summary & Details – cd7438f2-4816-4c80-8f08-65ea8966774f

Great job! No new security vulnerabilities introduced in this pull request