Adding Foundations of Private Computation to Courses and a Tutorial

[gubertoli]

I am adding two gems from OpenMined.

Resource Addition

Category

Courses and Tutorials.

Description

I added a blog post to the Tutorials sections, and it is about FL for Credit Scoring. This blog post was my first contact with FL, and it was an outstanding first contact with it, introducing significant topics.

In the Courses section I added the "Foundations of Private Computation" from OpenMined, it is almost a graduation around PETs.

Checklist

• I have followed the contribution guidelines
• The resource is freely accessible (or marked if paid)
• I have added it to the appropriate category
• The link is functional
• The description is clear and concise

[leriomaggio]

Thank you very much @gubertoli for contributing.

Could you please rebase and resolve conflicts before I could merge this PR?

Many thanks!