feat: add form validation & tooltips for single prediction (SBP-483 SBP-485)

[minh-biocommons]

Pull Request

Summary

SBP-483: Add form validation for single prediction based on sequence length and number of entities
SBP-485: Add tooltips for single prediction tool settings

Type of change

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• Documentation update

Checklist

• I have added tests that prove my fix is effective or that my feature works
• I have added or updated documentation where necessary
• I have run linting and unit tests locally
• The code follows the project's style guidelines