Add remote-auth token helper (get selfbot token via a link, no devtools)

bot/src/get-token.ts uses discord.js-selfbot-v13 DiscordAuthWebsocket: it
prints the Discord Remote Auth URL (https://discord.com/ra/<code> — the same
thing a login QR encodes). Open it on a phone with the Discord app, approve the
"New login" prompt, and the user token is written to .env as
DISCORD_SELFBOT_TOKEN. Works from a single mobile device (no second screen, no
password, no browser devtools). `bun run token`.

bot/src/get-token.ts

@@ -0,0 +1,79 @@
+/**
+ * Selfbot token helper — get a user-account token via Discord Remote Auth,
+ * WITHOUT devtools, a password, or a second screen.
+ *
+ * How it works: Discord's "scan QR to log in" is just a link of the form
+ * https://discord.com/ra/<code>. This script asks Discord for that link and
+ * prints it. Open the link on a phone that has the Discord app installed and
+ * approve the "New login" prompt — the token is sent back here and written to
+ * the repo-root .env as DISCORD_SELFBOT_TOKEN.
+ *
+ *   bun run token        # from bot/
+ *
+ * ⚠️  The token belongs to whatever account is logged into the Discord app that
+ *     APPROVES the request. Switch the app to a BURNER account first — never
+ *     approve with your main account (selfbot use can get that account banned).
+ *
+ * ⚠️  The link expires in ~2 minutes. Approve promptly.
+ */
+import { readFileSync, writeFileSync, existsSync } from "node:fs";
+import { fileURLToPath } from "node:url";
+// Optional native peer dep; only needed for this helper.
+// @ts-ignore - provided by discord.js-selfbot-v13 (optionalDependency)
+import { DiscordAuthWebsocket } from "discord.js-selfbot-v13";
+
+const ENV_PATH = fileURLToPath(new URL("../../.env", import.meta.url));
+
+function upsertEnv(key: string, value: string) {
+  let lines: string[] = [];
+  if (existsSync(ENV_PATH)) {
+    lines = readFileSync(ENV_PATH, "utf8").split("\n");
+  }
+  const idx = lines.findIndex((l) => l.startsWith(`${key}=`));
+  if (idx >= 0) lines[idx] = `${key}=${value}`;
+  else {
+    if (lines.length && lines[lines.length - 1] !== "") lines.push("");
+    lines.push(`${key}=${value}`);
+  }
+  writeFileSync(ENV_PATH, lines.join("\n"));
+}
+
+async function main() {
+  const ws: any = new DiscordAuthWebsocket();
+
+  ws.on("ready", () => {
+    console.log("\n================ DISCORD REMOTE LOGIN ================");
+    console.log("아래 링크를 디스코드 앱이 깔린 폰에서 여세요 (버너 계정으로 로그인된 상태!):");
+    console.log("\nAUTH_URL: " + ws.AuthURL + "\n");
+    console.log("열면 '새 기기 로그인' 승인 화면이 뜹니다. 승인하면 토큰이 자동 저장됩니다.");
+    console.log("링크는 약 2분 후 만료됩니다.");
+    console.log("=====================================================\n");
+  });
+
+  ws.on("pending", (user: any) => {
+    console.log(`[remote-auth] 스캔됨: ${user?.username ?? "?"} — 폰에서 '승인'을 눌러주세요.`);
+  });
+
+  ws.on("finish", (token: string) => {
+    upsertEnv("DISCORD_SELFBOT_TOKEN", token);
+    console.log(`[remote-auth] ✅ 토큰 수신 — ${ENV_PATH} 의 DISCORD_SELFBOT_TOKEN 에 저장했습니다.`);
+    ws.destroy?.();
+    process.exit(0);
+  });
+
+  ws.on("cancel", () => {
+    console.log("[remote-auth] ❌ 사용자가 취소했습니다.");
+    process.exit(1);
+  });
+  ws.on("closed", () => {
+    console.log("[remote-auth] 연결 종료(만료 또는 닫힘). 다시 실행하세요.");
+    process.exit(1);
+  });
+
+  await ws.connect();
+}
+
+main().catch((e) => {
+  console.error("remote-auth 실패:", e);
+  process.exit(1);
+});