feat(InputNumber): add showButtons prop

[J-Michalek]

🔗 Linked issue

Resolves: #4718

❓ Type of change

• 📖 Documentation (updates to the documentation or readme)
• 🐞 Bug fix (a non-breaking change that fixes an issue)
• 👌 Enhancement (improving an existing functionality)
• ✨ New feature (a non-breaking change that adds functionality)
• 🧹 Chore (updates to the build process or auxiliary tools and libraries)
• ⚠️ Breaking change (fix or feature that would cause existing functionality to change)

📚 Description

I added a new props showButtons that add the option to hide the buttons.

📝 Checklist

• I have linked an issue or discussion.
• I have updated the documentation accordingly.

[J-Michalek]

The wording in the docs could be improved and also I'm not sure about the prop name some alternatives would be hideButtons: boolean, buttons: boolean or perhaps integrate it into the increment and decrement props to allow false to be passed in and hide the button...

[pkg-pr-new]

npm i https://pkg.pr.new/@nuxt/ui@4805

commit: 504862f