add option to set trace level (#1393)

Signed-off-by: Govardhan G D <chioni1620@gmail.com>

vscode/package.json

@@ -42,6 +42,12 @@
 					"type": "string",
 					"default": "",
 					"description": "Use the executable at this path and do not download or update solang. Leave this empty for automatic download."
+				},
+				"solidity.trace.server": {
+					"scope": "window",
+                    			"type": "string",
+                    			"enum": ["off","messages","verbose"],
+                    			"default": "verbose"
 				}
 			}
 		},