[Feature] Add CancelIcon to Sistent #1463

Desired Behavior

Create a CancelIcon in Sistent to reduce dependency on @mui/icons-material and ensure design consistency across Layer5 products.

Mockups

https://mui.com/material-ui/material-icons/?query=Cancel&selected=Cancel

Contributor Guide

• 🎨 Wireframes and designs for Sistent site in Figma (open invite)