[Docs] add CODE_OF_CONDUCT.md

[XuehaiPan]

Xref: https://www.contributor-covenant.org/version/2/1/code_of_conduct/

Summary by CodeRabbit

• Documentation
  • Added a Code of Conduct (Contributor Covenant) describing expected and prohibited behaviors, moderation responsibilities, scope, and how to report issues.
  • Included enforcement guidelines with escalation steps: correction, warning, temporary ban, and permanent ban.
  • Added attribution, references, and translation notes to support clarity and inclusivity.

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Review failed

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Walkthrough

Adds a new Contributor Covenant Code of Conduct file describing community pledge, expected and unacceptable behaviors, scope, reporting procedures, enforcement responsibilities, and a ladder of consequences (correction, warning, temporary ban, permanent ban), plus attribution and translation notes.

Changes

Cohort / File(s)	Summary
Community Governance CODE_OF_CONDUCT.md	Adds a Contributor Covenant Code of Conduct covering pledge, standards of behavior, scope, enforcement roles, reporting process, enforcement ladder (correction → warning → temporary ban → permanent ban), and attribution/translation references.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

Poem

I twitch my whiskers, ink a vow,
New rules to keep the warren plough.
Gentle nudges, warnings fair,
Bans reserved with measured care.
Hop on—our kindly code we sow. 🥕

Pre-merge checks and finishing touches

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title Check	✅ Passed	The title “[Docs] add CODE_OF_CONDUCT.md” clearly and concisely reflects the addition of the new Code of Conduct document without unnecessary detail, file lists, or vague terminology.
Docstring Coverage	✅ Passed	No functions found in the changes. Docstring coverage check skipped.

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📜 Recent review details

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Review profile: CHILL

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Reviewing files that changed from the base of the PR and between b426eb7 and 034a354.

📒 Files selected for processing (1)

• CODE_OF_CONDUCT.md (1 hunks)

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Actionable comments posted: 1

📜 Review details

Configuration used: CodeRabbit UI

Review profile: CHILL

Plan: Pro

📥 Commits

Reviewing files that changed from the base of the PR and between a13cde2 and b426eb7.

📒 Files selected for processing (1)

• CODE_OF_CONDUCT.md (1 hunks)

🧰 Additional context used

🪛 markdownlint-cli2 (0.18.1)

CODE_OF_CONDUCT.md

63-63: Bare URL used

(MD034, no-bare-urls)

⏰ Context from checks skipped due to timeout of 90000ms. You can increase the timeout in your CodeRabbit configuration to a maximum of 15 minutes (900000ms). (2)

• GitHub Check: format-check
• GitHub Check: format-check