Fixes vector-im/element-x-ios/issues/117 - Event permalink timeline action

* moved NSRegularExpression outside of the AttributedString builder into the MatrixEntityRegex
* fixed eventId v3 regex
* added permalink builders for users, room identifiers and aliases, and events
* added timeline item permalink contextual menu actions and error alerts
* added an app wide ServiceLocator and moved the top level userIndicatorPresenter to it.
* added URL constructor that takes a StaticString and returns an non-optional
* Include Unit and UI tests in the swiftlint search paths

ElementX/Sources/Screens/RoomScreen/View/RoomScreen.swift

@@ -33,6 +33,7 @@ struct RoomScreen: View {
                 RoomHeaderView(context: context)
             }
         }
+        .alert(item: $context.alertInfo) { $0.alert }
     }
     
     private func sendMessage() {

ElementX/Sources/Screens/RoomScreen/View/TimelineItemContextMenu.swift

@@ -25,11 +25,15 @@ public struct TimelineItemContextMenu: View {
         ForEach(contextMenuActions, id: \.self) { item in
             switch item {
             case .copy:
-                Button("Copy") {
+                Button(ElementL10n.actionCopy) {
                     callback(item)
                 }
             case .quote:
-                Button("Quote") {
+                Button(ElementL10n.actionQuote) {
+                    callback(item)
+                }
+            case .copyPermalink:
+                Button(ElementL10n.permalink) {
                     callback(item)
                 }
             }