feature/Add CI workflow template for back-merge

[Le-Caignec]

This is the github documentation that i followed => https://docs.github.com/en/actions/sharing-automations/creating-workflow-templates-for-your-organization

Benefits

• Consistency Across Projects: Ensures the same coding standards, steps, and checks are applied in all repositories.
• Faster Setup: Saves time by avoiding repetitive configuration, so teams can simply select a template and start using it.
• Shared Best Practices: Encourages teams to use and share proven workflows and reduces the chance of misconfigurations.

Drawbacks

• Improved templates still need to be updated (or manually synced) in each repository
• Many code duplication