Enhance the update-dependencies script:

- Add the new version number to the commit and PR message.
- Check if anything has been updated and no-op if there wasn't anything updated.
- Add support to CC indviduals on the PR.

scripts/update-dependencies/DependencyInfo.cs

@@ -0,0 +1,15 @@
+// Copyright (c) .NET Foundation and contributors. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+
+namespace Microsoft.DotNet.Scripts
+{
+    public class DependencyInfo
+    {
+        public string Name { get; set; }
+        public string IdPattern { get; set; }
+        public string IdExclusionPattern { get; set; }
+        public string NewReleaseVersion { get; set; }
+
+        public bool IsUpdated { get; set; }
+    }
+}