Feat: may setup proxy (#238)

* add https proxy

* remove proxy in renderer

* proxy work for openai request

* use proxyAgent to enable system proxy

* add proxy setting

* tweak proxy setting

enjoy/src/main/proxy-agent.ts

@@ -0,0 +1,21 @@
+import settings from "@main/settings";
+import { HttpsProxyAgent } from "https-proxy-agent";
+import { ProxyAgent } from "proxy-agent";
+import fetch from "node-fetch";
+
+export default function () {
+  const proxyConfig = settings.getSync("proxy") as ProxyConfigType;
+  let proxyAgent = new ProxyAgent();
+
+  if (proxyConfig.enabled && proxyConfig.url) {
+    proxyAgent = new ProxyAgent({
+      httpAgent: new HttpsProxyAgent(proxyConfig.url),
+      httpsAgent: new HttpsProxyAgent(proxyConfig.url),
+    });
+  }
+
+  return {
+    httpAgent: proxyAgent,
+    fetch,
+  };
+}