Add macos/ios app using rust lib

FastCoster/FastCosterUITests/FastCosterUITestsLaunchTests.swift

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+//
+//  FastCosterUITestsLaunchTests.swift
+//  FastCosterUITests
+//
+//  Created by Michael Pivato on 1/2/2023.
+//
+
+import XCTest
+
+final class FastCosterUITestsLaunchTests: XCTestCase {
+
+    override class var runsForEachTargetApplicationUIConfiguration: Bool {
+        true
+    }
+
+    override func setUpWithError() throws {
+        continueAfterFailure = false
+    }
+
+    func testLaunch() throws {
+        let app = XCUIApplication()
+        app.launch()
+
+        // Insert steps here to perform after app launch but before taking a screenshot,
+        // such as logging into a test account or navigating somewhere in the app
+
+        let attachment = XCTAttachment(screenshot: app.screenshot())
+        attachment.name = "Launch Screen"
+        attachment.lifetime = .keepAlways
+        add(attachment)
+    }
+}