Implement bare minimum modal component

[valentinpalkovic]

Closes #8

I have created a basic Modal component based on radix UI. The styling and polishing will be done in a separate task.

📦 Published PR as canary version: 0.0.9--canary.18.0c6aa80.0

✨ Test out this PR locally via:

npm install @storybook/[email protected]
# or 
yarn add @storybook/[email protected]

[socket-security]

New dependency changes detected. Learn more about Socket for GitHub ↗︎

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👍 No new dependency issues detected in pull request

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Pull request alert summary

Issue	Status
Install scripts	✅ 0 issues
Native code	✅ 0 issues
Bin script confusion	✅ 0 issues
Bin script shell injection	✅ 0 issues
Shell access	✅ 0 issues
Uses eval	✅ 0 issues
Unresolved require	✅ 0 issues
Invalid package.json	✅ 0 issues
HTTP dependency	✅ 0 issues
Git dependency	✅ 0 issues
GitHub dependency	✅ 0 issues
New author	✅ 0 issues
Potential typo squat	✅ 0 issues
Known Malware	✅ 0 issues
Telemetry	✅ 0 issues
Protestware/Troll package	✅ 0 issues

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📊 Modified Dependency Overview:

➕ Added Package	Capability Access	+/- Transitive Count	Publisher
@storybook/[email protected]	None	+8	yannbf
@radix-ui/[email protected]	None	+25	benoitgrelard

[yannbf]

LGTM, with a few minor comments