Add CODE_OF_CONDUCT.md to establish community standards

[Nitya-003]

The Problem

Currently, the Pinicker repository lacks a CODE_OF_CONDUCT.md file. As the project encourages forking and community contributions, it is essential to have a clear set of guidelines that define acceptable behavior, promote an inclusive environment, and outline the process for reporting instances of straying from these standards.

Proposed Solution

I propose adopting the Contributor Covenant (v2.1), which is the industry standard for open-source projects. This will provide:

1. Clear Expectations: Definitions of positive behavior (using welcoming language, being respectful of differing viewpoints).
2. Unacceptable Behavior: Clear boundaries regarding harassment, trolling, and other non-professional conduct.
3. **Enforcement Guidelines: Responsibilities of the maintainers to take action when necessary.

Tasks

[ ] Create a CODE_OF_CONDUCT.md file in the root directory.
[ ] Include contact information for reporting (typically the maintainer's email).
[ ] Link the Code of Conduct in the README.md or CONTRIBUTING.md for better visibility.

I am happy to draft this document and submit a PR. Please assign this to me! @Nitya-003

Labels: documentation, SWOC, SWOC'26