Added dummy legacy language id

Author: AndreasArvidsson

packages/cursorless-engine/src/languages/LegacyLanguageId.ts

@@ -2,6 +2,6 @@
  * The language IDs that we have full tree-sitter support for using our legacy
  * modifiers.
  */
-export const legacyLanguageIds = [] as const;
+export const legacyLanguageIds = [""] as const;
 
 export type LegacyLanguageId = (typeof legacyLanguageIds)[number];

packages/cursorless-engine/src/languages/getNodeMatcher.ts

@@ -37,7 +37,9 @@ export function getNodeMatcher(
 export const languageMatchers: Record<
   LegacyLanguageId,
   Partial<Record<SimpleScopeTypeType, NodeMatcher>>
-> = {};
+> = {
+  "": {},
+};
 
 function matcherIncludeSiblings(matcher: NodeMatcher): NodeMatcher {
   return (