feat: add support for Java SDK

[ewanharris]

Description

This PR updates the SDK snippets to now include the Java SDK, it is split into 2 pieces to aid with review:

• 1688323 - Updates the SDK snippets components with the relevant Java code
• 8d8ee70 - Updates the documentation mdx and related files files to reference the SDK and enable the Java SDK where necessary.

Marking as draft for now as requires the two following changes in the Java SDK, once they are released we can consider this PR ready:

• .context on ClientCheckRequest fix(client): add context to ClientCheckRequest java-sdk#41
• Fix for not providing transactionChunkSize fix(java-sdk): fix incorrect check for whether transactionChunkSize is not set sdk-generator#270

All code has been tested to be functional and formatting has been mimicked from IntelliJ.

References

Closes #604

Review Checklist

• I have clicked on "allow edits by maintainers".
• I have added documentation for new/changed functionality in this PR or in a PR to openfga.dev [Provide a link to any relevant PRs in the references section above]
• The correct base branch is being used, if not main
• I have added tests to validate that the change in functionality is working as expected

[github-actions]

PR Preview Action v1.4.6
🚀 Deployed preview to https://openfga.github.io/openfga.dev/pr-preview/pr-615/
on branch gh-pages at 2024-01-22 18:44 UTC