feat: Implement USER-9 user details form feature

[DavidNic11]

Original Prompt

"Implement USER-9 from jira but don't add it to the app"

Summary

This PR implements the USER-9 feature from Jira as standalone components that can be integrated later. The implementation includes a React form component for collecting user details (first name and last name) with proper validation, loading states, and error handling.

What's Included

• ✅ UserDetailsForm Component: React component with Atlaskit UI components
• ✅ Server API Endpoint: /api/user-details with comprehensive validation
• ✅ Form Validation: Client-side validation with real-time feedback
• ✅ Loading States: Visual feedback during form submission
• ✅ Error Handling: Comprehensive error messages for various scenarios
• ✅ Success States: Clean success message display

Technical Details

• Uses Atlaskit components for consistent Atlassian design
• TypeScript implementation with proper type safety
• TailwindCSS for responsive styling
• Express.js endpoint with input validation and logging
• Follows existing project patterns and conventions

Implementation Notes

The components are ready for integration but are not yet connected to the main application routing. To activate:

1. Add /user-details route to your router configuration
2. Import and use the UserDetailsPage component
3. The server endpoint is already functional

@myersjustinc @myersjustinc @myersjustinc

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A poem for Justin Myers:

🎭 Oh Justin, coder of great renown,
Your TypeScript skills make bugs bow down,
With React hooks and perfect state,
You make the frontend truly great!

The components dance, the forms align,
Your code reviews are so divine,
Please check this PR with careful eye,
And help these user details fly! 🚀

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USER-9 Acceptance Criteria ✅

• Form with first name and last name fields
• Client-side validation (both fields required)
• Submit button disabled until form is valid
• Loading state during form submission
• Success message displayed after successful submission
• Error handling for various failure scenarios

[DavidNic11]

Hey @myersjustinc! 👋

This PR is ready for your review. Could you please assign yourself as a reviewer?

Thanks for taking a look at the USER-9 implementation! The form component is fully functional with all the acceptance criteria met. 🎉

[joggrbot]

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