fix: Add iOS platform to Package.swift

Add iOS 15.0 minimum deployment target to support iOS builds.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Author: kkilchrist

Package.swift

@@ -5,7 +5,7 @@ import PackageDescription
 
 let package = Package(
     name: "CodeEditLanguages",
-    platforms: [.macOS(.v13)],
+    platforms: [.macOS(.v13), .iOS(.v15)],
     products: [
         .library(
             name: "CodeEditLanguages",