feat(Icon): added new resizable-handle-icon

### Overview

<img width="27" alt="Screenshot 2025-06-06 at 2 07 07 PM" src="https://github.com/user-attachments/assets/e5a410a2-8a76-4b2f-a578-4fefaa2371f3" />

### PR Checklist

- [ ] Related to designs: https://www.figma.com/design/EeupudDpQO59dwmQh4Sclj/CAISY-Role-Playing-Simulation-v2?node-id=2266-7161&p=f&m=dev
- [ ] Related to JIRA ticket: https://skillsoftdev.atlassian.net/browse/CAISY4YOU-112
- [ ] I have run this code to verify it works
- [ ] This PR includes unit tests for the code change
- [ ] This PR includes testing instructions tests for the code change
- [ ] The alpha package of this PR is passing end-to-end tests in all relevant Codecademy repositories

#### Testing Instructions

[Don't make me tap the sign.](https://i.imgur.com/sy93D9I.png)

1. Go to storybook Icon ?path=/docs/atoms-icons-regular--docs
2. Search for ResizableHandleIcon

#### PR Links and Envs

| Repository   | PR Link                                                  |
| :----------- | :------------------------------------------------------- |
| Monolith     | [Monolith PR](http://www.google.fr/ 'Named link title')
| Mono       | [Mono PR](http://www.google.fr/ 'Named link title')

Author: NarsimhaRaj