[PB-3527]:feat/replace custom file grid with UI library Grid component

[jaaaaavier]

Description

This PR refactors the DriveExplorerGrid component to use the newly standardized Grid component from the @internxt/ui library, key changes:

• Replaced the custom .files-grid CSS class implementation in [DriveExplorerGrid.tsx] with the generic <Grid> component imported from @internxt/ui.
• Wrapped both the files list and the loading skeletons used within the InfiniteScroll in the new element to ensure consistent container layouts at all times.
• Deleted DriveExplorerGrid.scss

Related Issues

Related Pull Requests

-ui/feat/grid-generic-component

Checklist

• Changes have been tested locally.
• Unit tests have been written or updated as necessary.
• The code adheres to the repository's coding standards.
• Relevant documentation has been added or updated.
• No new warnings or errors have been introduced.
• SonarCloud issues have been reviewed and addressed.
• QA Passed

Testing Process

• Linked the local @internxt/ui utilizing yarn link
• Verified that the new UI component works as expected

Additional Notes

[cloudflare-workers-and-pages]

Deploying drive-web with    Cloudflare Pages

Latest commit:	19462c4
Status:	🚫  Build failed.

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