File-dropzone: Add support for disabled state

[prashanthr6383]

Description

References Fixes #847

Type of change

• [ ] Bug fix (non-breaking change which fixes an issue)
• [x] 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?

https://deploy-preview-2902--moduswebcomponents.netlify.app/?path=/story/components-file-dropzone--default&args=disabled:true

Checklist

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

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[coliff]

Please ensure dark mode styles have been fixed:

[prashanthr6383]

Please ensure dark mode styles have been fixed:

Hi @coliff, I have added the dark mode styles. please check

[prashanthr6383]

@prashanth-offcl accidently removed the comment. I have removed the font-weight property as you mentioned