fix(guide): simplify directory structure

guide/english/swift/view-controller/index.md

@@ -0,0 +1,23 @@
+---
+title: View Controllers
+---
+## View Controllers
+
+This is an example of what a basic view in Swift looks like. 
+
+ ```Swift
+  import UIKit
+
+  class ViewController: UIViewController {
+      // 1
+      override func viewDidLoad() {
+          // 2
+          super.viewDidLoad()
+          // 3
+          view.backgroundColor = .white
+      }  
+  }
+ ```
+1. Loads view after the controller loads.
+2. Overrides the UIViewController class. This is a necessary step for any view controller.
+3. Sets background color to white.