Move and update Package.swift

Package.swift

@@ -0,0 +1,35 @@
+// swift-tools-version:5.5
+// The swift-tools-version declares the minimum version of Swift required to build this package.
+
+import PackageDescription
+
+let tag = "0.1-alpha.1"
+let checksum = "d91403566498f01cdaaafc07a9360ef661151e64075c6d83bbce4c9b5bfa7cee"
+let url = "https://github.com/lightningdevkit/ldk-node/releases/download/\(tag)/LDKNodeFFI.xcframework.zip"
+
+let package = Package(
+    name: "ldk-node",
+    platforms: [
+        .iOS(.v15)
+        .macOS(.v12),
+    ],
+    products: [
+        // Products define the executables and libraries a package produces, and make them visible to other packages.
+        .library(
+            name: "LDKNode",
+            targets: ["LDKNodeFFI", "LDKNode"]),
+    ],
+    targets: [
+        .target(
+            name: "LDKNode",
+            dependencies: ["LDKNodeFFI"],
+            path: "./bindings/swift/Sources",
+            swiftSettings: [.unsafeFlags(["-suppress-warnings"])]
+        )
+        .binaryTarget(
+            name: "LDKNodeFFI",
+            url: url,
+            checksum: checksum,
+            ),
+    ]
+)