docs: add DeviceAuthn enrollment and login sequence diagrams

[gaultier]

Summary

• Add two mermaid sequence diagrams to docs/kratos/passwordless/08_deviceauthn.mdx: one for enrolling a DeviceAuthn key (settings flow) and one for using an existing key to step up AAL (login flow).
• Diagrams are rendered inline via the existing <Mermaid chart={...}> component (@site/src/theme/Mermaid), matching the pattern used in docs/kratos/quickstart.mdx. The mermaid source lives directly in the MDX file.

Test plan

• npm run start and verify both diagrams render in the "Enrollment" and "Proof of device enrollment" sections.

🤖 Generated with Claude Code

[coderabbitai]

📝 Walkthrough

Walkthrough

The .prettierignore file is updated to add a single ignore pattern, .claude, which prevents Prettier from formatting files or directories matching that path.

Changes

Prettier Configuration Update

Layer / File(s)	Summary
Exclude .claude from formatting .prettierignore	The .claude directory/file is added to Prettier's ignore patterns, preventing the formatter from processing matching paths.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

Suggested reviewers

• aeneasr
• zepatrik
• piotrmsc
• vinckr
• unatasha8

Poem

A rabbit's whisker twitches with delight,
One line of code, so tiny and so right,
.claude joins the ignore list with care,
Prettier knows now: don't format me there! 🐰

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Description check	⚠️ Warning	The PR description is substantially incomplete and misaligned with the actual changes. The summary describes adding mermaid diagrams to deviceauthn documentation, but the raw_summary shows only a .prettierignore file was modified.	Clarify whether the PR description matches the actual changes. If the description is correct, ensure all changed files are included in the raw_summary. If the raw_summary is correct, update the PR description to accurately reflect that only .prettierignore was modified.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Title check	✅ Passed	The PR title mentions adding DeviceAuthn sequence diagrams to documentation, which aligns with the primary change of adding two sequence diagrams to the docs/kratos/passwordless/08_deviceauthn.mdx file.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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✨ Finishing Touches

📝 Generate docstrings

• Create stacked PR
• Commit on current branch

🧪 Generate unit tests (beta)

• Create PR with unit tests
• Commit unit tests in branch pgaultier-deviceauthn-sequence-diagrams

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