add getTranscodeDecision controller endpoint and types

src/renderer/api/navidrome/navidrome-controller.ts

@@ -941,6 +941,7 @@ export const NavidromeController: InternalControllerEndpoint = {
             totalRecordCount: res.totalRecordCount,
         };
     },
+    getTranscodeDecision: SubsonicController.getTranscodeDecision,
     getUserInfo: SubsonicController.getUserInfo,
     getUserList: async (args) => {
         const { apiClientProps, query } = args;