feat(custom-widgets): Full Mantine v9 + SubFetch support for custom JSX (#6304)

e2e/shared/mock-api-server.ts

@@ -1,35 +0,0 @@
-import { createServer } from "node:http";
-
-import type { Server } from "node:http";
-
-export interface MockApiServer {
-  url: string;
-  port: number;
-  close: () => Promise<void>;
-}
-
-export const startMockApiServerAsync = async (responseBody: unknown): Promise<MockApiServer> => {
-  const body = JSON.stringify(responseBody);
-
-  const server: Server = await new Promise((resolve) => {
-    const s = createServer((_req, res) => {
-      res.writeHead(200, { "Content-Type": "application/json" });
-      res.end(body);
-    });
-    s.listen(0, "0.0.0.0", () => resolve(s));
-  });
-
-  const address = server.address();
-  if (!address || typeof address === "string") {
-    throw new Error("Failed to start mock API server");
-  }
-
-  return {
-    port: address.port,
-    url: `http://host.docker.internal:${address.port}`,
-    close: () =>
-      new Promise((resolve, reject) => {
-        server.close((error) => (error ? reject(error) : resolve()));
-      }),
-  };
-};