Add Subsonic API and types

src/renderer/api/utils.ts

@@ -8,3 +8,16 @@ export const resultWithHeaders = <ItemType extends z.ZodTypeAny>(itemSchema: Ite
     headers: z.instanceof(AxiosHeaders),
   });
 };
+
+export const resultSubsonicBaseResponse = <ItemType extends z.ZodRawShape>(
+  itemSchema: ItemType,
+) => {
+  return z.object({
+    'subsonic-response': z
+      .object({
+        status: z.string(),
+        version: z.string(),
+      })
+      .extend(itemSchema),
+  });
+};