fix: Add missing import

Author: maximkrouk

Sources/FoundationExtensions/General/RuntimeWarnings.swift

@@ -84,3 +84,48 @@ let formatter: DateFormatter = {
 }()
 #endif
 #endif
+
+#if os(WASI)
+		public let isTesting = false
+#else
+		import Foundation
+
+		/// Whether or not the current process is running tests.
+		///
+		/// You can use this information to prevent application code from running when hosting tests. For
+		/// example, you can wrap your app entry point:
+		///
+		/// ```swift
+		/// import IssueReporting
+		///
+		/// @main
+		/// struct MyApp: App {
+		///   var body: some Scene {
+		///     WindowGroup {
+		///       if !isTesting {
+		///         MyRootView()
+		///       }
+		///     }
+		///   }
+		/// }
+		///
+		/// To detect if the current task is running inside a test, use ``TestContext/current``, instead.
+		public let isTesting = ProcessInfo.processInfo.isTesting
+
+		extension ProcessInfo {
+				fileprivate var isTesting: Bool {
+						if environment.keys.contains("XCTestBundlePath") { return true }
+						if environment.keys.contains("XCTestBundleInjectPath") { return true }
+						if environment.keys.contains("XCTestConfigurationFilePath") { return true }
+						if environment.keys.contains("XCTestSessionIdentifier") { return true }
+
+						return arguments.contains { argument in
+								let path = URL(fileURLWithPath: argument)
+								return path.lastPathComponent == "swiftpm-testing-helper"
+										|| argument == "--testing-library"
+										|| path.lastPathComponent == "xctest"
+										|| path.pathExtension == "xctest"
+						}
+				}
+		}
+#endif