ci: Add Continuous Integration

[flemzord]

🍣 Context / problem
There is no Continuous Integration yet. It is a software development good practice.

🎯 Idea / solution
Using GitHub Actions (with CodeQL integration) to automatically run testing, linting, scanning, vulnerability checking, etc.

💡 Discussion / consequences
Each time a commit is pushed on a branch, then some automated checks are executed.

🤖 Tests / checks
Check that GitHub Checks are displayed and executed

[jbuget]

Thanks a lot @flemzord for the PR 🙏

Can you refine the title and add a description to the PR, something like :

Suggestion of title : "ci: Add Continuous Integration"

Suggestion of description :

🍣 Context / problem

There is no Continuous Integration yet. It is a software development good practice.

🎯 Idea / solution

Using GitHub Actions (with CodeQL integration) to automatically run testing, linting, scanning, vulnerability checking, etc.

💡 Discussion / consequences

Each time a commit is pushed on a branch, then some automated checks are executed.

🤖 Tests / checks

Check that GitHub Checks are displayed and executed

[jbuget]

🚀 Code is ok. I just wait for answers to my 2 minor questions before merging

[jbuget]

question: why this cron value (each friday at 21h35) ?

[HEYGUL]

an why on each pull_request is not enough ?

[flemzord]

CodeQL is quite slow, and relies on CVEs.
You can spin it more often, but I'm not sure it's really more comfortable.

Ditto for running it on all the PRs, this is possible

[jbuget]

🙏 Thank you for all @flemzord . I did not know CodeQL. Very interesting. I merge.

PS : instead of CVEs, you meant CWEs (Common Weakness Enumeration), right ?