Feat: add missing verification info

[0xjei]

This PR will include the following issues in order to complete the issue https://github.com/privacy-scaling-explorations/groth-p0tion/issues/44

• [x] https://github.com/privacy-scaling-explorations/groth-p0tion/issues/52
• [x] https://github.com/privacy-scaling-explorations/groth-p0tion/issues/35
• [x] https://github.com/privacy-scaling-explorations/groth-p0tion/issues/50
• [x] https://github.com/privacy-scaling-explorations/groth-p0tion/issues/19