Add custom footer slot for Modal component

[pchaudh18]

Description

References #1728

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation update

How Has This Been Tested?

Checklist

• My code follows the style guidelines of this project
• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules
• I have checked my code and corrected any misspellings

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[msankaran0712]

@palakchaudhary18 I have modified the code to fix some issues. Kindly use the exact code from the attachment
ModusModal.zip

[msankaran0712]

Please use the attachment files for the latest code

[pchaudh18]

Hi
I have updated the branch with new changes for the modus-modal and some auto-updated files