Fix: Removed duplicate files (CODE_OF_CONDUCT.md, CONTRIBUTING.md)

[Syeda-Mal]

Fixes

Fixes #22

Description

This PR removes the duplicate files CODE_OF_CONDUCT.md and CONTRIBUTING.md from the repo and updates the README.md file accordingly to ensure the utilization of organization default community health files as outlined in GitHub Repo Guidelines.

Related to (creativecommons/.github#38)

Screenshots

Checklist

• My pull request has a descriptive title (not a vague title like Update index.md).
• My pull request targets the default branch of the repository (main or master).
• My commit messages follow best practices.
• My code follows the established code style of the repository.
• I added or updated tests for the changes I made (if applicable).
• I added or updated documentation (if applicable).
• I tried running the project locally and verified that there are no
  visible errors.

Developer Certificate of Origin

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Developer Certificate of Origin

Developer Certificate of Origin
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    of my knowledge, is covered under an appropriate open source
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