Move to Mantine v7 and css modules from Styled Components

[dipiash]

Description

Please include a summary of the changes and the issue number (if applicable). Please also include relevant motivation and context.

Fixes # (issue)

Type of Change

Please delete options that are not relevant.

• 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

Checklist

• I have read the contribution guidelines
• My code follows the code style 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

Screenshots (if applicable)

You can attach screenshots here to visually represent your changes (e.g., UI changes).

Additional Notes

Add any additional notes or context about the pull request here.