[DOCS] Add JuliaHealth Tutorials Section for Discoverability

[TheCedarPrince]

One of the biggest conclusions that @Farreeda helped me realize (as well as some additional discussions with @DilumAluthge and @gdalle) is that the biggest problem facing JuliaHealth isn't so much the development of novel packages (although, granted, there are features that still need to be implemented in Julia) but rather novel compositions of how packages that already exist within the Julia ecosystem can be composed together to address problems within the context of Julia-based health research.

To kick off the JuliaHealth tutorials section, @Farreeda has been doing great work in developing a small pipeline showing how pre-existing tools within Julia can be used to address patient-level prediction questions. We need to add a new page for tutorials as well as the prediction tutorial.

[TheCedarPrince]

Hey @sneha9231, so the tentative idea for this issue to get started is as follows:

1. Create a tutorial landing page (like here: https://juliaanimators.github.io/Javis.jl/stable/tutorials/)
2. Integrate that into the Website as a new tab

For now, this could be one PR that I think would be great!

[sneha9231]

okay @TheCedarPrince , thank you for the clarification and explanation