new: add sha256 to github action for ios

Package.swift

@@ -3,24 +3,45 @@
 
 import PackageDescription
 
-let package = Package(
-    name: "Libcore",
-    platforms: [
-        .iOS(.v13) // Minimum platform version
-    ],
-    products: [
-        .library(
-            name: "Libcore",
-            targets: ["Libcore"]),
-    ],
-    dependencies: [
-        // No dependencies
-    ],
-    targets: [
-        .binaryTarget(
-            name: "Libcore",
-            url: "https://github.com/hiddify/hiddify-next-core/releases/download/draft/hiddify-libcore-ios.xcframework.zip",
-            checksum: "70f84a51508898a706e72ab9eda4af8ab72c321bf79284b38313764b8f2091b2"
-        )
-    ]
-)
+func fetchChecksum(from url: String) throws -> String {
+    guard let checksumURL = URL(string: url) else {
+        throw NSError(domain: "Invalid URL", code: 0, userInfo: nil)
+    }
+
+    let checksumString = try String(contentsOf: checksumURL)
+    return checksumString.trimmingCharacters(in: .whitespacesAndNewlines)
+}
+
+let version = "draft"
+let baseURL = "https://github.com/hiddify/hiddify-next-core/releases/download/"
+let packageURL = "\(baseURL)\(version)/hiddify-libcore-ios.xcframework.zip"
+let checksumURL = "\(packageURL).sha256"
+
+do {
+    let package = Package(
+        name: "Libcore",
+        platforms: [
+            .iOS(.v13) // Minimum platform version
+        ],
+        products: [
+            .library(
+                name: "Libcore",
+                targets: ["Libcore"]),
+        ],
+        dependencies: [
+            // No dependencies
+        ],
+        targets: [
+            .binaryTarget(
+                name: "Libcore",
+                url: packageURL,
+                checksum: try fetchChecksum(from: checksumURL)
+            )
+        ]
+    )
+} catch {
+    // Handle URL or checksum fetch errors
+    print("Error: \(error)")
+    // You might want to exit or handle the error in a way suitable for your application
+    // exit(1)
+}