v0.3.1 with Saxon fully working

src/transform/transformService.ts

@@ -0,0 +1,27 @@
+import { nativeXsltEngine } from './nativeXsltEngine';
+import { saxonJsDynamicEngine } from './saxonJsDynamicEngine';
+
+import type {
+  TransformEngine,
+  TransformEngineId,
+  TransformRequest,
+  TransformResult,
+} from './transformTypes';
+
+const engines: Record<TransformEngineId, TransformEngine> = {
+  'saxon-js-dynamic': saxonJsDynamicEngine,
+  'native-xsltprocessor': nativeXsltEngine,
+};
+
+export function getTransformEngine(id: TransformEngineId): TransformEngine {
+  return engines[id] ?? saxonJsDynamicEngine;
+}
+
+export async function runTransformation(
+  request: TransformRequest
+): Promise<TransformResult> {
+  const engine = getTransformEngine(request.engine);
+  return engine.transform(request);
+}
+
+export const availableTransformEngines = Object.values(engines);