Add kaptinlin/jsonschema to Go implementations

[kaptinlin]

What kind of change does this PR introduce?

Feature

Issue Number:

• Closes #___
• Related to #___
• Others?

Screenshots/videos:

N/A

If relevant, did you update the documentation?

Yes, the documentation is updated with new implementation details.

Summary

This PR introduces a new Go JSON Schema validator, kaptinlin/jsonschema, to the list of implementations on the JSON Schema website. This library supports JSON Schema Draft 2020-12, providing advanced features such as enhanced output formats and multilingual error messaging. The inclusion of this library expands the tools available for Go developers in the JSON Schema community, aligning with the site's aim to list tools that support at least one recent version of the specification.

Does this PR introduce a breaking change?

No, this PR does not introduce a breaking change as it only adds new content to the list of existing implementations.

[github-actions]

Hey there 👋!

Are you an implementer of a new JSON Schema related tool, or an interested user submitting a tool you like?
If so, thanks for considering adding your tool to our collection -- and if not, sorry, I'm just a bot looking at which pages you're modifying!

Someone will review your pull request shortly.

In the interim, if you haven't already, there's a few things you might be interested in reviewing or confirming:

1. Short description: Tell us a small bit about your tool! We love staying up to date on what's out there, and what your intentions are in writing it.
2. Come Join Our Slack!: We have an #implementers channel for anyone interested in or building JSON Schema tooling!
   An invite can be found here or on our homepage!
3. Common Interfaces: We maintain a page with some "commonly useful programming interfaces" that tooling may want to implement and present to your users.
   You can find that page here in our documentation.
   Have a read through and consider whether you implement or should implement any of what's there.
4. Bowtie Harness: Bowtie is a tool which gives JSON Schema users access to a huge number of different implementations across many languages, and reports on the compliance of those implementations with the JSON Schema specifications.
   If it makes sense for your kind of tool, consider writing a harness which connects it to Bowtie. Instructions for doing so can be found in the tutorial in Bowtie's documentation.

If you have any questions, any feedback, or need help with the submission process, don't hesitate to reach out.
Thanks a bunch for your awesome contribution!

[github-actions]

Welcome to the JSON Schema Community. Thanks a lot for creating your first pull request!! 🎉🎉 We are so excited you are here! We hope this is only the first of many! For more details check out README.md file.

[benjagm]

Thanks a lot for improving the JSON Schema ecosystem by creating you Implementation and thanks for adding it to the website!!