Add Code of Conduct

CODE_OF_CONDUCT.md

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+# Code of Conduct
+
+## Our Pledge
+We as members, contributors, and maintainers pledge to make participation in this project a
+harassment free experience for everyone, regardless of age, body size, visible or invisible
+disability, ethnicity, sex characteristics, gender identity and expression, level of experience,
+education, socio-economic status, nationality, personal appearance, race, religion, or sexual
+identity and orientation.
+
+We pledge to act and interact in ways that contribute to an open, welcoming, diverse,
+inclusive, and healthy community.
+
+## Our Standards
+Examples of behavior that contributes to a positive environment include:
+- Using welcoming and inclusive language
+- Being respectful of differing viewpoints and experiences
+- Gracefully accepting constructive criticism
+- Focusing on what is best for the community
+- Showing empathy towards other community members
+
+Examples of unacceptable behavior include:
+- Harassment, discrimination, or hate speech
+- Trolling, insulting or derogatory comments, and personal attacks
+- Publishing others’ private information without explicit permission
+- Any conduct which could reasonably be considered inappropriate in a professional setting
+
+## Enforcement Responsibilities
+Project maintainers are responsible for clarifying and enforcing our standards of acceptable
+behavior and will take appropriate and fair corrective action in response to any behavior that
+they deem inappropriate, threatening, offensive, or harmful.
+
+## Scope
+This Code of Conduct applies within all project spaces, and also applies when an individual is
+officially representing the project in public spaces.
+
+## Enforcement
+Instances of abusive, harassing, or otherwise unacceptable behavior may be reported by opening
+an issue or contacting the project maintainers.
+
+All complaints will be reviewed and investigated promptly and fairly.
+
+## Enforcement Guidelines
+Project maintainers will follow these guidelines in determining the consequences for any
+action they deem in violation of this Code of Conduct:
+
+1. **Correction** – A warning explaining the violation.
+2. **Warning** – A formal warning for continued unacceptable behavior.
+3. **Temporary Ban** – Temporary removal from the community.
+4. **Permanent Ban** – Permanent removal from the community.
+
+## Attribution
+This Code of Conduct is adapted from the
+[Contributor Covenant](https://www.contributor-covenant.org), version 2.1.