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/Services/Timeline/RoomTimelineController.swift

@@ -32,16 +32,19 @@ class RoomTimelineController: RoomTimelineControllerProtocol {
         }
     }
     
+    let roomId: String
     let callbacks = PassthroughSubject<RoomTimelineControllerCallback, Never>()
     
     private(set) var timelineItems = [RoomTimelineItemProtocol]()
     
     init(userId: String,
+         roomId: String,
          timelineProvider: RoomTimelineProviderProtocol,
          timelineItemFactory: RoomTimelineItemFactoryProtocol,
          mediaProvider: MediaProviderProtocol,
          memberDetailProvider: MemberDetailProviderProtocol) {
         self.userId = userId
+        self.roomId = roomId
         self.timelineProvider = timelineProvider
         self.timelineItemFactory = timelineItemFactory
         self.mediaProvider = mediaProvider