Formatter and PeekDefinition Telemetry (#245)

- Add telemetry point for format requests
- Update PeekDefinition telemetry so that it captures whether the attempt succeeded and if it was connected. This will help us understand whether our current behavior of just notifying success/failure to the output window was useful or not. It will also help us understand whether we're doing a good job implementing this / if we need to improve reliability and preformance.

src/Microsoft.SqlTools.ServiceLayer/Utility/Extensions.cs

@@ -30,5 +30,13 @@ namespace Microsoft.SqlTools.ServiceLayer.Utility
 
             return str;
         }
+
+        /// <summary>
+        /// Converts a boolean to a "1" or "0" string. Particularly helpful when sending telemetry
+        /// </summary>
+        public static string ToOneOrZeroString(this bool isTrue)
+        {
+            return isTrue ? "1" : "0";
+        }
     }
 }