[Swift] Implement new Concept Exercise: tuples

[wneumann]

This issue describes how to implement the tuples concept exercise for the Swift track.

Getting started

Please please please read the docs before starting. Posting PRs without reading these docs will be a lot more frustrating for you during the review cycle, and exhaust Exercism's maintainers' time. So, before diving into the implementation, please read the following documents:

• The features of v3.
• Rationale for v3.
• What are concept exercises and how are they structured?

Please also watch the following video:

• The Anatomy of a Concept Exercise.

Goal

This concept exercise should convey a basic understanding of how to work with tuples in Swift. This concept exercise should therefore teach the student how to create, extract values from, and decompose tuples.

Things to teach

• Creating tuples
• Extracting tuple components
• Decomposing tuples
• Labeled tuples

Things not to teact

• Structs or other sum types

Concepts

• tuples

Prerequisites

• basics

Resources to refer to

Hints

• Swift Language Guide - Tuples

After

• Swift Language Guide - Tuples
• Swift Language Guide - Functiuons with multiple return values

Representer

TBD

Analyzer

TBD

Implementing

See the Swift track implementation guide for guidance.

Help

If you have any questions while implementing the exercise, please post the questions as comments in this issue.

[wneumann]

I will work on this exercise.

[wneumann]

PR added, pending review.

[wneumann]

Closed with pr https://github.com/exercism/v3/pull/1820. May need additional work on the polar coordinates section in future PR.