Sort the results of Get-SecretInfo correctly

Instead of using a `SortedDictionary` which introduced a bug because it required
the keys (secret names) to be unique, we just sort the array directly using a
comparer that sorts by name.

Fixes #95.

Author: andyleejordan

src/code/SecretManagement.cs

@@ -1061,15 +1061,9 @@ private void WriteResults(SecretInformation[] results)
             if (results == null) { return; }
 
             // Ensure each vaults results are sorted by secret name.
-            var sortedList = new SortedDictionary<string, SecretInformation>(StringComparer.OrdinalIgnoreCase);
-            foreach (var item in results)
-            {
-                sortedList.Add(
-                    key: item.Name,
-                    value: item);
-            }
+            Array.Sort(results, new SecretInformationComparer());
 
-            foreach (var item in sortedList.Values)
+            foreach (var item in results)
             {
                 WriteObject(item);
             }

src/code/Utils.cs

@@ -291,6 +291,17 @@ private SecretInformation()
 
         #endregion
     }
+    
+    /// <summary>
+    ///  Compares secret information by name.
+    /// </summary>
+    public class SecretInformationComparer : IComparer<SecretInformation>
+    {
+        public int Compare(SecretInformation x, SecretInformation y)
+        {
+            return string.Compare(x.Name, y.Name, StringComparison.Ordinal);
+        }
+    }
 
     #endregion