Add indentation rules support for gdscript

configurations/gdscript-configuration.json

@@ -21,5 +21,9 @@
         ["(", ")"],
         ["[", "]"],
         ["{", "}"]
-    ]
-}
+    ],
+    "indentationRules": {
+        "increaseIndentPattern": "^\\s*((class|func|else|elif|for|if|match|while|enum)|(.*\\sdo\\b))\\b[^\\{;]*$",
+        "decreaseIndentPattern": "^\\s*([}\\]]([,)]?\\s*(#|$)|\\.[a-zA-Z_]\\w*\\b)|(else|elif|return|break|continue)\\b)"
+    }
+}