Add to Dock Localised strings (#3494)

Task/Issue URL: https://app.asana.com/0/1206329551987282/1208577512136638/f

**Description**:
Add localised strings for Add to Dock.

DuckDuckGo/UserText.swift

@@ -1412,4 +1412,20 @@ But if you *do* want a peek under the hood, you can find more information about
             public static let skip = NSLocalizedString("onboarding.highlights.fireDialog.cta.skip", value: "Skip", comment: "The title of the fire button CTA to skip erasing the data.")
         }
     }
+
+    public enum AddToDockOnboarding {
+        public enum Buttons {
+            static let addToDockTutorial = NSLocalizedString("contextual.onboarding.addToDock.buttons.tutorial", value: "Show Me How", comment: "Button at the end of the browser onboarding. On click it shows the user a video about how to add the application to the device dock.")
+            static let dismiss = NSLocalizedString("contextual.onboarding.addToDock.buttons.dismiss", value: "Start Browsing", comment: "Button on the last screen of the onboarding, it will dismiss the onboarding screen.")
+        }
+
+        public enum EndOfJourney {
+            static let message = NSLocalizedString("contextual.onboarding.addToDock.endOfJourney.message", value: "Remember, every time you browse with me a creepy ad loses its wings.\n\nSo keep me in your Dock for daily browsing.", comment: "Message of the last screen of the onboarding to the browser app.")
+        }
+
+        public enum Tutorial {
+            static let title = NSLocalizedString("contextual.onboarding.addToDock.tutorial.title", value: "Adding me to your Dock is easy.", comment: "The title of the onboarding dialog popup that explains how to add the DDG browser icon to the dock.")
+            static let message = NSLocalizedString("contextual.onboarding.addToDock.tutorial.message", value: "Find or search for the DuckDuckGo icon on your home screen. Then press and drag into place. That’s it!", comment: "The message of the onboarding dialog popup that explains how to add the DDG browser icon to the dock.")
+        }
+    }
 }

DuckDuckGo/en.lproj/Localizable.strings

@@ -761,6 +761,21 @@
 /* Button to answer question 'Did turning off protections resolve the issue on this site?' */
 "broken.site.report.toggle.alert.yes.button" = "Yes";
 
+/* Button on the last screen of the onboarding, it will dismiss the onboarding screen. */
+"contextual.onboarding.addToDock.buttons.dismiss" = "Start Browsing";
+
+/* Button on the last screen of the onboarding, it will show the Add to Duck tutorial. */
+"contextual.onboarding.addToDock.buttons.tutorial" = "Show Me How";
+
+/* Message of the last screen of the onboarding to the browser app. */
+"contextual.onboarding.addToDock.endOfJourney.message" = "Remember, every time you browse with me a creepy ad loses its wings.\n\nSo keep me in your Dock for daily browsing.";
+
+/* The message of the onboarding dialog popup that explains how to add the DDG browser icon to the dock. */
+"contextual.onboarding.addToDock.tutorial.message" = "Find or search for the DuckDuckGo icon on your home screen. Then press and drag into place. That’s it!";
+
+/* The title of the onboarding dialog popup that explains how to add the DDG browser icon to the dock. */
+"contextual.onboarding.addToDock.tutorial.title" = "Adding me to your Dock is easy.";
+
 /* First parameter is a count of additional trackers, second and third are names of the tracker networks (strings) */
 "contextual.onboarding.browsing.multiple.trackers" = "contextual.onboarding.browsing.multiple.trackers";