Add Support for v2 JSON API

[vchendrix]

This enhancement request is to add support for the v2 JSON API to the OSTI eLink plugin. This update will introduce a third supported OSTI eLink version, allowing for improved functionality and compatibility with the latest API standards.

Proposed Changes:

• Implement support for the v2 JSON API.
• Update documentation to reflect the new supported version.
• Ensure backward compatibility with existing OSTI eLink versions.

Benefits:

• Enhanced functionality and compatibility with the latest API standards.
• Improved data handling and integration capabilities.

Additional Information:
Please refer to the OSTI eLink documentation for more details on the v2 JSON API.