Adds reader mode shortcut (cmd+shift+R)

App/KeyboardShortcuts.swift

@@ -47,6 +47,9 @@ protocol ShortcutResponder: AnyObject {
     
     @objc
     optional func toggleDarkMode(_ sender: Any?)
+    
+    @objc
+    optional func openInReaderMode(_ sender: Any?)
 }
 
 fileprivate extension Array {
@@ -88,6 +91,13 @@ public class KeyboardShortcuts {
                     action: #selector(ShortcutResponder.focusURLBar)
                 ),
                 
+                // Open in Reader
+                UIKeyCommand(
+                    modifiers: [ .command, .shift ], input: "R",
+                    title: "Open in Reader Mode…",
+                    action: #selector(ShortcutResponder.openInReaderMode)
+                ),
+                
                 // Tabs
                 UIMenu(options: .displayInline, children: [
                     // Create Tab