Upgrade examples to snake_case builtins and PNC

[lukewilliamboswell]

Paired with the breaking change roc-lang/roc#7463

[smores56]

What is this Task thing? I've never heard of it.

[lukewilliamboswell]

Status: all of the examples updated with the exception of the platforms (DotNet, Go), and the ImportPackageFromModule example.

To update ImportPackageFromModule we will need to first upgrade roc-lang/unicode.

Edit : we need to do a pass over all the README's... I definitely missed a bunch of things in there.

[Anton-4]

Status: all of the examples updated with the exception of the platforms (DotNet, Go), and the ImportPackageFromModule example.
To update ImportPackageFromModule we will need to first upgrade roc-lang/unicode.
Edit : we need to do a pass over all the README's... I definitely missed a bunch of things in there.

I can take this

[Anton-4]

All done :)
I did both updates and improvements of the example code and README.

[Anton-4]

To update ImportPackageFromModule we will need to first upgrade roc-lang/unicode.

This still needs to be done