PoC Electron app (#264)

Initial version of Electron wrapper + build pipeline

desktop/http_util.ts

@@ -0,0 +1,29 @@
+import axios from "axios";
+import fs from "node:fs";
+
+export async function downloadFile(
+  url: string,
+  destFile: string,
+): Promise<void> {
+  const file = fs.createWriteStream(destFile);
+  let response = await axios.request({
+    url: url,
+    method: "GET",
+    responseType: "stream",
+  });
+  return new Promise((resolve, reject) => {
+    response.data.pipe(file);
+    let error: Error | null = null;
+    file.on("error", (e) => {
+      error = e;
+      reject(e);
+    });
+    file.on("close", () => {
+      if (error) {
+        return;
+      }
+      file.close();
+      resolve();
+    });
+  });
+}