feat (governance): Create CODE_OF_CONDUCT.md

[jpmewenemesse]

Added a CODE_OF_CONDUCT.md file based on the Contributor Covenant.

Purpose

This code of conduct defines community standards and expectations for all contributors, maintainers, and participants in the TOSIT/OKDP project.

[rpignolet]

I'm not the right person to review this kind of thing, but it seems good to me.

[nviault-dgfip]

I'm not used to this kind of document, but after reading it, I have a few comments.

1. Section: ## Enforcement
   Regarding the reporting process: I think that reporting incidents through public channels like GitHub Discussions or live meetings can be very intimidating for victims and may compromise confidentiality.
   Proposal : not sure .... perhaps a dedicated email address for these reports ??? 🤔
   This would ensure that only the authorized moderators see the sensitive information

2. Section: ## Enforcement Responsibilities
   we use the term "Community Leaders" throughout the document to define those with the authority to moderate and ban. However, for a new contributor, it might be unclear who these individuals actually are (TOSIT board? Repo maintainers?).
   Proposal : we should either list the designated moderators here or provide a link to a GOVERNANCE.md or MAINTAINERS.md file. This also helps reporters know who to contact if a specific leader is the one being reported

3. Section: ## Enforcement : Response Time
   Perhaps we should add a timeframe for our response
   Proposal : Consider adding a sentence like: "We will acknowledge receipt of any report within xx business hours." to assure the reporter that their concern is being taken seriously and won't fall into a "black hole."

[Pierrotws]

+1 for merge

[lioneloh]

ok pour moi