feat(ios): add Swift Package Manager support

CHANGELOG.md

@@ -2,6 +2,11 @@
 
 The changelog for `Superwall`. Also see the [releases](https://github.com/superwall/Superwall-Flutter/releases) on GitHub.
 
+## Unreleased
+
+### Enhancements
+- Adds Swift Package Manager (SPM) support for iOS, alongside the existing CocoaPods support. This removes the "plugin does not support Swift Package Manager" warning under Flutter 3.44+ while remaining fully backward compatible with CocoaPods.
+
 ## 2.4.12
 
 ### Enhancements

ios/.gitignore

@@ -35,4 +35,8 @@ Icon?
 
 /Flutter/Generated.xcconfig
 /Flutter/ephemeral/
-/Flutter/flutter_export_environment.sh
+/Flutter/flutter_export_environment.sh
+# Swift Package Manager
+.build/
+.swiftpm/
+Package.resolved

ios/superwallkit_flutter.podspec

@@ -11,7 +11,7 @@ Pod::Spec.new do |s|
   s.license          = { :file => '../LICENSE' }
   s.author           = { 'Superwall' => 'jake@superwall.com' }
   s.source           = { :path => '.' }
-  s.source_files = 'Classes/**/*'
+  s.source_files = 'superwallkit_flutter/Sources/superwallkit_flutter/**/*'
   s.dependency 'Flutter'
   s.dependency 'SuperwallKit', '4.14.2'
   s.platform = :ios, '14.0'

ios/superwallkit_flutter/Package.swift

@@ -0,0 +1,27 @@
+// swift-tools-version: 5.9
+// The swift-tools-version declares the minimum version of Swift required to build this package.
+
+import PackageDescription
+
+let package = Package(
+    name: "superwallkit_flutter",
+    platforms: [
+        .iOS("14.0")
+    ],
+    products: [
+        .library(name: "superwallkit-flutter", targets: ["superwallkit_flutter"])
+    ],
+    dependencies: [
+        // Pinned to match the version declared in the podspec
+        // (s.dependency 'SuperwallKit', '4.14.2').
+        .package(url: "https://github.com/superwall/Superwall-iOS.git", exact: "4.14.2")
+    ],
+    targets: [
+        .target(
+            name: "superwallkit_flutter",
+            dependencies: [
+                .product(name: "SuperwallKit", package: "Superwall-iOS")
+            ]
+        )
+    ]
+)