feat: add openapi gen to core

packages/easy-ast/src/easy-ast.ts

@@ -86,7 +86,7 @@ class LightweightDefinitionBuilder {
         esModuleInterop: true,
         experimentalDecorators: true,
         inlineSourceMap: true,
-        module: ts.ModuleKind.CommonJS,
+        module: ts.ModuleKind.NodeNext,
         strict: true,
         target: ts.ScriptTarget.ES2015,
       },

packages/easy-ast/src/types/lightweight-project.ts

@@ -23,7 +23,7 @@ import {LightweightDefinition} from './lightweight-definition.js';
  */
 function buildIndex(project: LightweightProject): Record<string, string> {
   return Object.fromEntries(
-    Object.values(project).flatMap((definitions, file) =>
+    Object.entries(project).flatMap(([file, definitions]) =>
       Object.keys(definitions).map(definition => [definition, file.toString()]),
     ),
   );