Added Package.swift to root

Package.swift

@@ -0,0 +1,34 @@
+// swift-tools-version: 5.8
+// The swift-tools-version declares the minimum version of Swift required to build this package.
+
+import PackageDescription
+
+let package = Package(
+    name: "FutureFlow",
+    platforms: [
+        .iOS(.v14),
+        .macOS(.v11),
+        .tvOS(.v14),
+        .watchOS(.v7)
+    ],
+    products: [
+        .library(
+            name: "FutureFlow",
+            targets: ["FutureFlow"]
+        ),
+    ],
+    targets: [
+        .target(
+            name: "FutureFlow",
+            dependencies: [],
+            path: "FutureFlow/Sources"
+        ),
+        .testTarget(
+            name: "FutureFlowTests",
+            dependencies: ["FutureFlow"],
+            path: "FutureFlow/Tests/FutureFlowTests"
+        ),
+    ],
+    swiftLanguageVersions: [.v5]
+)
+