[Feature] Add Timer Icon to Icon Collection

[Rajesh-Nagarajan-11]

Desired Behavior

Create a Timer icon in Sistent for time-based indicators and actions.

Mockups

• https://mui.com/material-ui/material-icons/?query=timer&selected=Timer

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Contributor Guide

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