[Feature] Add GridOnIcon to Sistent

[rishiraj38]

Desired Behavior

Create a GridOnIcon in Sistent to reduce dependency on @mui/icons-material and ensure design consistency across Layer5 products. This is required to preserve the exact UX in Meshery's ViewSwitch component without visual regression.

Mockups

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

---

Contributor Guide

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

[indevi]

Will take this up