Fix CI

[mvanzulli]

This MR:

• Fixes CI on main
• Docs still fails because I haven't maintainer permissions so I can't add Documenter keys. Be a maintainer would speed up dev operations 😇
• Set coverage
• Update README including badges 🍡 .

CI passing in my fork: https://github.com/mvanzulli/FinancialDerivatives.jl/actions/runs/9050825985/job/24866677183

[mvanzulli]

@ibis:

This MR should be ready for review. Not sure if sth else is required on the maintainers or devs with permission side to finalize the set-up. Regarding the CD of pages, I think can be a follow-up, but I believe I need permissions to access to the repo keys.

[iblislin]

looks fine

• https://juliaquant.github.io/FinancialDerivatives.jl/stable/
• https://github.com/JuliaQuant/FinancialDerivatives.jl/actions/runs/9071920106/job/24926539051

🎉 🎉 🎉

[mvanzulli]

looks fine

* https://juliaquant.github.io/FinancialDerivatives.jl/stable/

* https://github.com/JuliaQuant/FinancialDerivatives.jl/actions/runs/9071920106/job/24926539051

🎉 🎉 🎉

Thanks for your review :100