[v3] Add key features

[ErikSchierboom]

This issue is part of the migration to v3. You can read full details about the various changes here.

In Exercism v3, each track must specify exactly six "key features". Exercism uses these features to highlight the most interesting, unique or "best" features of a language to a student.

Key features are specified in the top-level "key_features" field in the track's config.json file and are defined as an array of objects, as specified in the spec.

Goal

The "key_features" field in the config.json file should be updated to describe the six "key features" of this track. See the spec.

Example

{
  "key_features": [
    {
      "icon": "features-oop",
      "title": "Modern",
      "content": "C# is a modern, fast-evolving language."
    },
    {
      "icon": "features-strongly-typed",
      "title": "Cross-platform",
      "content": "C# runs on almost any platform and chipset."
    },
    {
      "icon": "features-functional",
      "title": "Multi-paradigm",
      "content": "C# is primarily an object-oriented language, but also has lots of functional features."
    },
    {
      "icon": "features-lazy",
      "title": "General purpose",
      "content": "C# can be used for a wide variety of workloads, like websites, console applications, and even games."
    },
    {
      "icon": "features-declarative",
      "title": "Tooling",
      "content": "C# has excellent tooling, with linting and advanced refactoring options built-in."
    },
    {
      "icon": "features-generic",
      "title": "Documentation",
      "content": "Documentation is excellent and exhaustive, making it easy to get started with C#."
    }
  ]
}

Tracking

https://github.com/exercism/v3-launch/issues/5

[MeerKatDev]

Some propositions:

{
  "key_features": [
    {
      "icon": "features-strongly-typed",
      "title": "Strongly typed system",
      "content": "In Scala, the typing is very precise and strict. The good news is, you don't have to always fix it, as the compiler will do that for you"
    },
    {
      "icon": "features-functional",
      "title": "Multi-paradigm",
      "content": "With Scala you can harness the power of both worlds, object-oriented and functional."
    },
    {
      "icon": "features-xxx",
      "title": "Intomperability with Java",
      "content": "You can use Java libraries and methods in Scala. Also, you can easily transition the whole codebase from Java to Scala, whatever its dimension".
    }
  ]
}

[ErikSchierboom]

Closed by #680