Feat improved slider with input fields

[uche102]

Closed #98

[uche102]

I've successfully resolved the linting and configuration issues:
Fixed: no-explicit-any warnings in payment-form.tsx by specifying types.
Updated: next.config.mjs to remove deprecated ESLint keys, resolving the build warnings.
Verified: Local npm run lint and npm run build are now passing 100%.
The "Preview Deployment" failure is due to a missing vercel-token in the repository's GitHub Secrets. This appears to be a project-level configuration issue rather than a code error.

[vercel]

@uche102 is attempting to deploy a commit to the kelly musk's projects Team on Vercel.

A member of the Team first needs to authorize it.