Feat: JS SDK upgraded to V2

[Kushal7788]

Description

Updated JS SDK to v2 and added new linking along with additional features. Updated README.md to include advanced configuration options for the Reclaim Protocol JavaScript SDK. Added features for adding context, setting parameters, custom redirect URLs, custom callback URLs, and exporting/importing SDK configurations. Included the facility on handling proofs on the backend.

Type of change

• [ ] Bug fix
• [x] New feature
• [x] Breaking change
• [x] Documentation update

Checklist:

• [x] I have read and agree to the Code of Conduct.
• [x] I have signed the Contributor License Agreement (CLA).
• [x] I have considered the Security Policy.
• [x] I have self-reviewed and tested my code.
• [x] I have updated documentation as needed.
• [x] I agree to the project's custom license.

Additional Notes:

This update provides more comprehensive guidance for users of varying experience levels, from beginners to those ready for more advanced implementations. It also clarifies the purpose and usage of the toJsonString() and fromJsonString() methods for exporting and importing SDK configurations.

[CLAassistant]

All committers have signed the CLA.