feat(macos): configuration window + curl-backed macOS updater (#71)

src/main/runtime/update/fetch-adapter.ts

@@ -0,0 +1,9 @@
+import type { FetchLike, FetchResponseLike } from './release-assets';
+
+export interface ElectronNetFetchLike {
+  fetch: (url: string, init?: Record<string, unknown>) => Promise<FetchResponseLike>;
+}
+
+export function createElectronNetFetch(net: ElectronNetFetchLike): FetchLike {
+  return (url, init) => net.fetch(url, init);
+}