Datagrid component redesign

[Jialecl]

Checklist

• [x] The build process is done without errors. All tests pass in the /lib directory.
• [x] Self-reviewed the code before submitting.
• [x] Meets accessibility standards.
• [x] Added/updated documentation to /website as needed.
• [x] Added/updated tests as needed.

Description Redesign of datagrid component, following the new design kit specifications, already using the new token architecture (CSS variables). Action icon is updated in a different PR.

Additional context Figma designs

[Mil4n0r]

Only hierarchical grid doc missing now.