Add documentation for issue management

[boubkerbribri]

Questions	Answers
Description	Please be specific when describing the PR. What did you add, why did you submit it?
Fixed ticket	Fixes #{issue number here} if there is a related issue

[boubkerbribri]

@PrestaEdit Thanks for your review The PR is still on draft, it was exported from another tool :smile: . @hibatallahAouadni will fix all this :rocket: and we can go on with the reviews

[eternoendless]

I fixed most small issues I found, it's ok for me after we revise the part with the corporate emails 👍

[eternoendless]

Thank you @boubkerbribri and @hibatallahAouadni