Add a Code of Conduct file to the repository

Description
The repository currently lacks a Code of Conduct file. This is an essential document to foster an inclusive and respectful community. Adding this file will help outline the expectations for interaction within the project and ensure a welcoming environment for contributors.

To Reproduce
N/A - This issue is about the absence of a document, not a bug.

Expected behavior
A CODE_OF_CONDUCT.md file should be added to the root of the repository, following best practices (e.g., using GitHub's Code of Conduct template or a customized version).

Screenshots
N/A

Desktop (please complete the following information):

• OS: [e.g. Windows, macOS]
• Browser: [e.g. Chrome, Firefox]
• Version: [e.g. 100.0]

Smartphone (please complete the following information):

• Device: [e.g. iPhone 12]
• OS: [e.g. iOS 15]
• Browser: [e.g. Safari]
• Version: [e.g. 15.0]

Additional context
The Code of Conduct file can be generated using GitHub’s built-in feature under the "Community Standards" section of the repository settings.