[wip] Add grammar-level parser for Rockstar

languages/rockstar/common/types.ts

@@ -1,4 +1,13 @@
+import { DocumentRange } from "../../types";
+import { Line } from "../parser/grammar-types";
+
 /** Type of props passed to renderer */
 export type RS = {
   value: number;
 };
+
+/** A single step of the Rockstar AST */
+export type ASTStep = {
+  op: Line;
+  range: DocumentRange;
+};