feat(core): support embeddedLanguages alias for backwards compatibility (#1044) (#1145)

Author: Ipshita29

packages/core/src/textmate/registry.ts

@@ -166,8 +166,9 @@ export class Registry extends TextMateRegistry {
   private resolveEmbeddedLanguages(lang: LanguageRegistration): void {
     this._langMap.set(lang.name, lang)
     this._langGraph.set(lang.name, lang)
-    if (lang.embeddedLangs) {
-      for (const embeddedLang of lang.embeddedLangs)
+    const embedded = lang.embeddedLanguages ?? lang.embeddedLangs
+    if (embedded) {
+      for (const embeddedLang of embedded)
         this._langGraph.set(embeddedLang, this._langMap.get(embeddedLang)!)
     }
   }

packages/types/src/langs.ts

@@ -20,6 +20,7 @@ export interface LanguageRegistration extends RawGrammar {
    * languages for each parent language.
    */
   embeddedLangs?: string[]
+  embeddedLanguages?: string[] // for VS code
   /**
    * A list of languages that embed the current language.
    * Unlike `embeddedLangs`, the embedded languages will not be loaded automatically.