feat: Add GitHub governance files

[dronefreak]

Added Governance & Contribution Files

• CONTRIBUTING.md – Explains how to contribute code, report issues, and propose features.
• CODE_OF_CONDUCT.md – Defines expected behavior for all contributors.
• SECURITY.md – Explains how to responsibly report security vulnerabilities.
• CHANGELOG.md – Maintains a history of notable changes per version following Keep a Changelog.
• SUPPORT.md – Provides guidance on where and how to get help with the project.
• GOVERNANCE.md – Describes project decision-making, roles, and maintainer authority.

Updated pre-commit config

• Added MD204 to be avoided in markdownlint-cli to avoid dissecting repeated additions (for example in CHANGELOG)

[lfagotbouquet]

I would prefer to add uv in a separate PR and to try to remove pip when doing it, WDYT?

I have the feeling that adding uv but continuing to rely on pip isn't really the proper way to use uv even if it's of course possible.

[lfagotbouquet]

Also I think the README.md file is still relying on pyenv right?

[dronefreak]

Yes the README is still relying on pyenv, that is because I did not change it yet. I was thinking that we can change the README later.

And for the uv vs pip question, I believe it is a good idea to keep pip, because, IMO, uv is not as stable as pip and not everyone uses it, so I would prefer to keep pip as a backup installation option.

[lfagotbouquet]

For this file I suppose it isn't an issue to use uv to create the virtual environment...

[lfagotbouquet]

It's a bit unclear if the governance files are intended for the template (i.e. for the projects done from the template) or the template repo itself.
I think it's more for the projects based on this template but if it's for the template repo itself it's a bit relevant because for the moment we can't have maintainers (I think we need an organization account for that and if we can have one freely I will try to do so).

In any case I think we should clarify it somewhere.

[dronefreak]

So basically this file specifically GOVERNANCE.md is primarily for large organisations and large projects. It is not meant for this particular template project, but it is more for the people who would use this template to start a big project perhaps.

It is more or less a generic file, and does not change a lot, so I can also remove it if you want. People can add it later if they want?

[lfagotbouquet]

I think it can be good to have this file but we should find a way to differentiate more clearly between the documentation files used for the projects created with the template and the template repo itself...

We can surely just mention it in the main README, what do you think?
I don't see a better way to specify it and it would be enough in my opinion.

[dronefreak]

Done. I have added some descriptions inside the README for the each individual project files. This will help users to isolate the files they need for the project and remove the ones that are not required.

L111 onwards in the README is the newly added section.

[lfagotbouquet]

Looks good to me, thanks!