Move assembly attributes to props file #10
Description
Background
To facilitate testing, we define the [InternalsVisibleTo] attribute on the assembly of each project.
Problem
We're currently use C# to do this, which puts another file into the solution explorer for every experiment.
Solution
We can define InternalsVisibleTo via MSBuild props file. We should do this to clean up the solution explorer for the user.
Relevant documentation:
https://learn.microsoft.com/en-us/dotnet/core/project-sdk/msbuild-props#internalsvisibleto