demo app + SDK updates:\n- Add direct ANI transfer (prepare -> transfer)\n- Add firmware update flow (fetch latest w/ x-api-key, OTA transfer)\n- Extract x-api-key to NetworkConstants\n- Rename example app to demo; move folder and entry to DemoApp\n- Switch from SPM package dependency to local framework target\n- Enable automatic Info.plist generation for framework target\n- Add placeholder test to satisfy SwiftPM test target\n- Regenerate XcodeGen project (demo.xcodeproj)

Package.swift

@@ -0,0 +1,27 @@
+// swift-tools-version: 5.9
+
+import PackageDescription
+
+let package = Package(
+    name: "DuooomiBleSDK",
+    platforms: [
+        .iOS(.v16)
+    ],
+    products: [
+        .library(
+            name: "DuooomiBleSDK",
+            targets: ["DuooomiBleSDK"]
+        ),
+    ],
+    targets: [
+        .target(
+            name: "DuooomiBleSDK",
+            path: "Sources/DuooomiBleSDK"
+        ),
+        .testTarget(
+            name: "DuooomiBleSDKTests",
+            dependencies: ["DuooomiBleSDK"],
+            path: "Tests/DuooomiBleSDKTests"
+        )
+    ]
+)