Repository description does not have a character limit even though the repository will fail to create if there are over 350 characters when creating a new project in the Hub

Steps to reproduce:

1. Open the Unity Hub
2. Click the "New project" button
3. Set Source control provider to GitHub
4. Enter over 350 characters in the Repository description
5. Observe the Hub

Actual results: There is no maximum character limit, repository fails to create if the project is created

Expected results: The Hub disables the "Create project" button and warns user that the description has over 350 characters

Reproducible with versions: 3.17.2

Tested on (OS): MacOS Silicon Tahoe 26.3

Notes:

• Project name and Repository name has character limit validation, but description does not