feat(RES-43): Fix du warning magick convert (#16)

Reviewed-on: #16

Sources/ResgenSwift/Images/Images.swift

@@ -128,4 +128,22 @@ struct Images: ParsableCommand {
         print(error.description)
         Self.exit(withError: error)
     }
+
+    @discardableResult
+    static func getMagickConvertPath() -> String {
+        // WARNING: The convert command is deprecated in IMv7, use "magick" instead of "convert"
+        let taskMagick = Shell.shell(["which", "magick"])
+        if taskMagick.terminationStatus == 0 {
+            return taskMagick.output!.removeCharacters(from: CharacterSet.whitespacesAndNewlines) // swiftlint:disable:this force_unwrapping
+        }
+
+        let taskConvert = Shell.shell(["which", "convert"])
+        if taskConvert.terminationStatus == 0 {
+            return taskMagick.output!.removeCharacters(from: CharacterSet.whitespacesAndNewlines) // swiftlint:disable:this force_unwrapping
+        }
+
+        let error = ImagesError.magickConvertNotFound
+        print(error.description)
+        Self.exit(withError: error)
+    }
 }