Add Code_of_conduct document.

[shloka-gupta]

I could not trace a code of conduct document.
If the organization already follows a code_of_conduct document then that can be put.
Otherwise, we could use the code_of_conduct document that is normally used by organizations.
i.e Contributor Covenant version 1.4.

[shloka-gupta]

cc @jravenel

[jravenel]

Hey @Chicken-Biryani, it's here : https://docs.naas.ai/project-overview/code-of-conduct
Should we put it in the repo as well?

[shloka-gupta]

@jravenel yes! I'll add it.

[shloka-gupta]

Hello, @jravenel on second thought. Just adding the link seems a better idea.

This is my proposal for revamping the original code of conduct-- https://hackmd.io/@9w-awoLYS8-TWvM6lvxy1A/S1BiycCk9