Add XXClient.Contact helpers

Examples/xx-messenger/Package.swift

@@ -53,6 +53,7 @@ let package = Package(
       name: "AppCore",
       dependencies: [
         .product(name: "XCTestDynamicOverlay", package: "xctest-dynamic-overlay"),
+        .product(name: "XXClient", package: "elixxir-dapps-sdk-swift"),
         .product(name: "XXDatabase", package: "client-ios-db"),
         .product(name: "XXModels", package: "client-ios-db"),
       ],

Examples/xx-messenger/Sources/AppCore/XXClientHelpers/XXContact+Helpers.swift

+import XXClient
+
+extension Contact {
+  public var username: String? {
+    try? getFacts().first(where: { $0.type == 0 })?.fact
+  }
+
+  public var email: String? {
+    try? getFacts().first(where: { $0.type == 1 })?.fact
+  }
+
+  public var phone: String? {
+    try? getFacts().first(where: { $0.type == 2 })?.fact
+  }
+}