Documentation Enhancement: Improve JS Library Section

Current Status

The current JS library section in the README could be more detailed and user-friendly.

Proposed Changes

I plan to enhance the JS library documentation with:

1. Clear explanation of the full workflow from raw email to proof verification
2. Example email and its intermediate numeric outputs
3. Step-by-step code examples showing:
   • Input generation
   • Proof generation
   • Proof verification
4. Better explanation of custom circuit usage

Benefits

• Makes it easier for new users to understand the workflow
• Provides concrete examples of input/output formats
• Shows complete working code samples
• Improves overall documentation clarity

Would you be interested in a PR implementing these changes?