fix: description preset for any types

[rmaced0]

Description

When a spec has a property that defines an open object like:

anyProp: {
      type: 'object',
      $id: 'AnyTest',
      properties: {},
      description: 'AnyTest description'
    }

it does not add the description to the generated models.

This PR fixes this issue.

Related Issue

Checklist

• The code follows the project's coding standards and is properly linted (npm run lint).
• Tests have been added or updated to cover the changes.
• Documentation has been updated to reflect the changes.
• All tests pass successfully locally.(npm run test).

Additional Notes

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[netlify]

✅ Deploy Preview for modelina canceled.

Name	Link
🔨 Latest commit	6579ee1
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[sonarqubecloud]

Quality Gate failed

Failed conditions
32.1% Duplication on New Code (required ≤ 3%)

See analysis details on SonarQube Cloud

[coveralls]

Pull Request Test Coverage Report for Build 13424486208

Details

• 4 of 4 (100.0%) changed or added relevant lines in 1 file are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-0.003%) to 92.397%

---

Totals
Change from base Build 13368384750:	-0.003%
Covered Lines:	6478
Relevant Lines:	6873

---

💛 - Coveralls

[asyncapi-bot]

🎉 This PR is included in version 4.0.4 🎉

The release is available on:

• npm package (@latest dist-tag)
• npm package (@latest dist-tag)
• GitHub release

Your semantic-release bot 📦🚀