feat(swift): add public SwiftPM package entry

Author: reez

.gitignore

@@ -19,6 +19,8 @@ DerivedData/
 *.xcframework.zip
 Info.plist
 Sources
+!cktap-swift/Sources/
+!cktap-swift/Sources/**
 lib*.a
 
 # Python ck-tap emulator

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
+
+// Update tag and checksum when publishing a new Swift binary release.
+let tag = "v0.1.0"
+let checksum = "0000000000000000000000000000000000000000000000000000000000000000"
+let url = "https://github.com/notmandatory/rust-cktap/releases/download/\(tag)/cktapFFI.xcframework.zip"
+
+let package = Package(
+    name: "rust-cktap",
+    platforms: [
+        .macOS(.v12),
+        .iOS(.v18),
+    ],
+    products: [
+        .library(
+            name: "CKTap",
+            targets: ["cktapFFI", "CKTap"]
+        ),
+    ],
+    targets: [
+        .target(
+            name: "CKTap",
+            dependencies: ["cktapFFI"],
+            path: "./cktap-swift/Sources"
+        ),
+        .binaryTarget(
+            name: "cktapFFI",
+            url: url,
+            checksum: checksum
+        ),
+    ]
+)

README.md

@@ -84,6 +84,14 @@ just run certs
 just run read
 ```
 
+## Swift Package
+
+Swift bindings are distributed from this repo as a Swift Package. Once a
+release includes `cktapFFI.xcframework.zip`, add the repository URL in Xcode
+and use the `CKTap` product.
+
+See `cktap-swift/README.md` for local development and release steps.
+
 ## Minimum Supported Rust Version (MSRV)
 
 This library should always compile with any valid combination of features on Rust **1.85.0**.

cktap-swift/Package.swift

@@ -7,7 +7,7 @@ let package = Package(
     name: "cktap-swift",
     platforms: [
         .macOS(.v12),
-        .iOS(.v15)
+        .iOS(.v18)
     ],
     products: [
         .library(