Add asc-client v0.1.0

Swift CLI for the App Store Connect API. Commands for managing apps,
versions, localizations, screenshots/previews, builds, and review
submission. Includes interactive credential setup and media upload
with retry support for stuck processing items.

Package.swift

@@ -0,0 +1,21 @@
+// swift-tools-version: 6.0
+
+import PackageDescription
+
+let package = Package(
+    name: "asc-client",
+    platforms: [.macOS(.v13)],
+    dependencies: [
+        .package(url: "https://github.com/aaronsky/asc-swift", from: "1.0.0"),
+        .package(url: "https://github.com/apple/swift-argument-parser", from: "1.3.0"),
+    ],
+    targets: [
+        .executableTarget(
+            name: "asc-client",
+            dependencies: [
+                .product(name: "AppStoreConnect", package: "asc-swift"),
+                .product(name: "ArgumentParser", package: "swift-argument-parser"),
+            ]
+        ),
+    ]
+)