Add Code of Conduct for project guidelines

Author: Namitjain07

CODE_OF_CONDUCT.md

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+# Code of Conduct
+
+## Our Commitment
+We are committed to creating a respectful, secure, and harassment-free environment for everyone contributing to the PrivacyFirst project.
+
+## Standards
+### Positive behavior includes:
+- Being respectful and considerate
+- Giving and accepting constructive feedback
+- Focusing on what is best for users’ security and privacy
+
+### Unacceptable behavior includes:
+- Harassment or discrimination of any type
+- Trolling or insulting comments
+- Publishing private information without permission
+
+## Responsibilities
+Project maintainers may remove or edit contributions that violate this Code of Conduct.
+
+## Scope
+This Code of Conduct applies within project spaces and in public spaces where an individual is representing the project.
+
+## Enforcement
+Instances of abusive behavior may be reported to the maintainer:  
+**Email:** your-email@example.com
+
+All complaints will be reviewed fairly.
+
+## Attribution
+This Code of Conduct is adapted from the Contributor Covenant.