feat: improve error page

[rohan-chaturvedi]

🔍 Overview

Improves the error page with styling fixes and more context for application errors.

💡 Proposed Changes

• Fix typography for light and dark theme
• Add error name and message
• Add top navbar with user menu

🖼️ Screenshots or Demo

📝 Release Notes

Improved the error page with styling fixes and more context for application errors.

✨ How to Test the Changes Locally

Run the dev server and add the following the any component or page file:

throw new Error('This is a test error')

💚 Did You...

• Ensure linting passes (code style checks)?
  - [ ] Update dependencies and lockfiles (if required)
  - [ ] Update migrations (if required)
  - [ ] Regenerate graphql schema and types (if required)
• Verify the app builds locally?
• Manually test the changes on different browsers/devices?