[json] add json.configuration

extensions/json/json.configuration.json

+{
+	"comments": {
+		"lineComment": "//",
+		"blockComment": [ "/*", "*/" ]
+	},
+	"brackets": [
+		["{", "}"],
+		["[", "]"]
+	]
+}
\ No newline at end of file

extensions/json/package.json

@@ -30,7 +30,8 @@
 				],
 				"mimetypes": [
 					"application/json"
-				]
+				],
+				"configuration": "./json.configuration.json"
 			}
 		],
 		"grammars": [