Add Swift Package Manager manifest

Package.swift

@@ -0,0 +1,48 @@
+// swift-tools-version: 6.0
+import PackageDescription
+
+// Swift Package Manager manifest for the iOS sources the CocoaPods podspec
+// ships (`source_files = "iOS/classes/**/*.{h,m,swift}", "iOS/RxBluetoothKit/**",
+// "iOS/RxSwift/**"`). The single ObjC file is an empty marker class, so the
+// manifest splits it from the pure-Swift body into a two-target library; no
+// source changes are needed. RxSwift and RxBluetoothKit are vendored in-tree
+// exactly as the podspec compiles them (Swift 5 language mode).
+let package = Package(
+    name: "MultiplatformBleAdapter",
+    platforms: [.iOS(.v13)],
+    products: [
+        .library(
+            name: "MultiplatformBleAdapter",
+            targets: ["MultiplatformBleAdapterKit", "MultiplatformBleAdapter"]
+        ),
+    ],
+    targets: [
+        .target(
+            name: "MultiplatformBleAdapterKit",
+            path: "iOS",
+            exclude: [
+                "MultiPlatformBLEAdapter-Bridging-Header.h",
+                "MultiPlatformBLEAdapter.xcodeproj",
+                "classes/MultiPlatformBLEAdapter.h",
+                "classes/MultiPlatformBLEAdapter.m",
+            ],
+            sources: ["classes", "RxBluetoothKit", "RxSwift"],
+            linkerSettings: [
+                .linkedFramework("CoreBluetooth"),
+                .linkedFramework("Foundation"),
+            ]
+        ),
+        .target(
+            name: "MultiplatformBleAdapter",
+            dependencies: ["MultiplatformBleAdapterKit"],
+            path: "iOS/classes",
+            sources: ["MultiPlatformBLEAdapter.h", "MultiPlatformBLEAdapter.m"],
+            publicHeadersPath: ".",
+            linkerSettings: [
+                .linkedFramework("CoreBluetooth"),
+                .linkedFramework("Foundation"),
+            ]
+        ),
+    ],
+    swiftLanguageModes: [.v5]
+)