feat(storybook): add pseudo-states addon

[geromegrignon]

PR Checklist

Please check if your PR fulfills the following requirements:

• [x] The commit message follows our guidelines: https://github.com/realworld-angular/realworld-angular-starter/blob/main/CONTRIBUTING.md
• [ ] Tests for the changes have been added (for bug fixes / features)
• [ ] Docs have been added / updated (for bug fixes / features)

PR Type

What kind of change does this PR introduce?

• [ ] Bugfix
• [ ] Feature
• [ ] Code style update (formatting, local variables)
• [ ] Refactoring (no functional changes, no api changes)
• [ ] Build related changes
• [ ] CI related changes
• [x] Documentation content changes
• [ ] Other... Please describe:

What is the current behavior?

Issue Number: N/A

What is the new behavior?

Add pseudo-state Storybook addon

Does this PR introduce a breaking change?

• [ ] Yes
• [x] No

Other information

[netlify[bot]]

✅ Deploy Preview for storybook-realworld-angular ready!

Name	Link
🔨 Latest commit	3de96919349526cf747a4c8f035e98298a760e53
🔍 Latest deploy log	https://app.netlify.com/sites/storybook-realworld-angular/deploys/66b12fb6b9a5060008a79d90
😎 Deploy Preview	https://deploy-preview-6--storybook-realworld-angular.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify site configuration.

[netlify[bot]]

✅ Deploy Preview for realworld-angular-starter ready!

Name	Link
🔨 Latest commit	3de96919349526cf747a4c8f035e98298a760e53
🔍 Latest deploy log	https://app.netlify.com/sites/realworld-angular-starter/deploys/66b12fb68fd5f9000830c995
😎 Deploy Preview	https://deploy-preview-6--realworld-angular-starter.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify site configuration.