Add enum type for code formatting presets

Author: Kapil Borle

src/PowerShellEditorServices.Protocol/Server/LanguageServerSettings.cs

@@ -93,6 +93,13 @@ public void Update(
         }
     }
 
+    public enum CodeFormattingPreset
+    {
+        Custom,
+        OTBS,
+        Allman
+    }
+
     public class CodeFormattingSettings
     {
         /// <summary>
@@ -120,6 +127,7 @@ public CodeFormattingSettings(CodeFormattingSettings codeFormattingSettings)
             }
         }
 
+        public CodeFormattingPreset Preset { get; set; }
         public bool OpenBraceOnSameLine { get; set; }
         public bool NewLineAfterOpenBrace { get; set; }
         public bool NewLineAfterCloseBrace { get; set; }