docs: group JSON-RPC overview and JWT auth in one section

[0xDevNinja]

Summary of changes

The JWT authentication guide was under "Knowledge Base", separate from the JSON-RPC reference it describes. This groups them together.

Changes introduced in this pull request:

• Moved knowledge_base/jwt_handling.md → reference/json-rpc/authentication.md (retitled "Authentication", sidebar_position: 1), so it sits right after the Overview in the JSON-RPC reference section.
• Repointed the two links that referenced the old page (the Overview's Authentication paragraph and the method-filtering guide).

The move preserves the page content as-is; only its location and the two inbound links change.

Reference issue to close (if applicable)

Closes #5211

Other information and links

Part of ChainSafe/forest-docs-v2#87. Kept it as a sibling page under the JSON-RPC section rather than inlining everything into the Overview, since the auth guide is fairly long — happy to fold it directly into the Overview instead if you'd prefer a single page.

Change checklist

• I have performed a self-review of my own code,
• I have made corresponding changes to the documentation. All new code adheres to the team's documentation standards,
• I have added tests that prove my fix is effective or that my feature works (if possible),
• I have made sure the CHANGELOG is up-to-date. All user-facing changes should be reflected in this document.

Outside contributions

• I have read and agree to the CONTRIBUTING document.
• I have read and agree to the AI Policy document. I understand that failure to comply with the guidelines will lead to rejection of the pull request.

Summary by CodeRabbit

• Documentation
  • Updated authentication-related links to point to the current reference page.
  • Renamed the authentication reference page title to a simpler “Authentication” label.
  • Improved sidebar ordering for the authentication docs section.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Repository UI

Review profile: CHILL

Plan: Pro

Run ID: 495adc86-0e74-4942-b3d7-961d181b6183

📥 Commits

Reviewing files that changed from the base of the PR and between 70b335d and 28a6e0b.

📒 Files selected for processing (3)

• docs/docs/users/guides/methods_filtering.md
• docs/docs/users/reference/json-rpc/authentication.md
• docs/docs/users/reference/json-rpc/overview.md

🔗 Linked repositories identified

CodeRabbit considers these linked repositories for cross-repo context during reviews:

• filecoin-project/lotus (manual)

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Walkthrough

Documentation link updates redirect references from the old jwt_handling knowledge base page to the new authentication reference page, and the authentication page's frontmatter title changed from "JWT Authentication" to "Authentication" with an added sidebar_position.

Changes

Documentation link and title updates

Layer / File(s)	Summary
Authentication page frontmatter update docs/docs/users/reference/json-rpc/authentication.md	Title changed from "JWT Authentication" to "Authentication"; sidebar_position: 1 added.
Update cross-references to authentication page docs/docs/users/guides/methods_filtering.md, docs/docs/users/reference/json-rpc/overview.md	Links updated to point to ./authentication and ../reference/json-rpc/authentication instead of the old jwt_handling knowledge base page.

Estimated code review effort: 1 (Trivial) | ~2 minutes

Suggested reviewers: sudo-shashank, hanabi1224

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately reflects moving JWT auth alongside the JSON-RPC overview in the docs.
Linked Issues check	✅ Passed	The JWT auth guide was moved into the JSON-RPC reference next to Overview, satisfying the request to keep them together.
Out of Scope Changes check	✅ Passed	The PR only updates docs paths, page metadata, and links, which are all directly related to the stated objective.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

✨ Simplify code

• Create PR with simplified code

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