Create an example Xcode project file to include in 'hello world' exercise

[masters3d]

exercism/objective-c#27

Create Empty Xcode File
exercism/exercism#2401 (comment)

Update WorkFlow.md
Use this tutorial as a basis to update the WorkFlow.md file
http://samuelmullen.com/2014/09/unit-testing-in-swift/

Example Solution to HelloWorld

struct HelloWorld{
    static func hello( _ input:String = "World") -> String{
        return "Hello, \(input)!"
    }
}

Hello World Test File

import XCTest

class  HelloWorldTest: XCTestCase {

    func testNoName(){
        let expected = "Hello, World!"
        XCTAssertEqual(HelloWorld.hello(), expected, "When given no name, we should greet the world!")
    }

    func testSampleName(){
        let expected = "Hello, Alice!"
        XCTAssertEqual(HelloWorld.hello("Alice"), expected, "When given 'Alice', we should greet Alice!")
    }

    func testOtherSampleName(){
        let expected = "Hello, Bob!"
        XCTAssertEqual(HelloWorld.hello("Bob"), expected, "When given 'Bob', we should greet Bob!")
    }

    func testNoStrangeName(){
        let expected = "Hello, !"
        XCTAssertEqual(HelloWorld.hello(""), expected, "When given an empty string, it is strange, but should have a space and punctuation")
    }

}