Add CGI support

[miky-rola]

• CGI Support: Execute dynamic scripts via the Common Gateway Interface.

[Az107]

The base branch is outdated, we need to rebase it against master to bring in the latest changes.
Also, your CGI module isn’t being used anywhere; the code is still relying on my prototype function in main.rs.
Maybe we could unify everything into the cgi module.
Also, it might make more sense for the cgi module to be part of the standalone server instead of the core library?
If you need any help with the rebase or reorganizing things, feel free to ask!

[miky-rola]

I'll need help with the rebasing, but I'll implement the suggestions regarding the cgi

[Az107]

No problem , I updated my branch feature/cgi
because had a lot of conflicts.
For future reference you could run
git rebase master
and it will update your checked branch against master, this could bring some conflicts so you need to fix these manually.