feat(userscript): GM_xmlhttpRequest transport, GM storage, metadata banner and build

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

scripts/userscript-banner.ts

@@ -0,0 +1,21 @@
+/** Tampermonkey/Violentmonkey metadata. @connect lists every host GM_xmlhttpRequest may reach. */
+export function userscriptBanner(version: string, serverUrl?: string): string {
+  const connects = ["api.mangabaka.org", "webtoons.com", "pstatic.net", "web.archive.org", "catbox.moe"];
+  if (serverUrl) connects.push(new URL(serverUrl).hostname);
+  const lines = [
+    "// ==UserScript==",
+    "// @name         MangaBaka Seeder",
+    "// @namespace    https://gitea.lucaswinther.info/lucasw89/mangabaka-seeder",
+    `// @version      ${version}`,
+    "// @description  Find every WEBTOON cover of a series and turn them into a MangaBaka cover edit request",
+    "// @match        https://mangabaka.org/*",
+    "// @grant        GM_xmlhttpRequest",
+    "// @grant        GM_getValue",
+    "// @grant        GM_setValue",
+    "// @grant        GM_deleteValue",
+    ...connects.map((host) => `// @connect      ${host}`),
+    "// @run-at       document-idle",
+    "// ==/UserScript==",
+  ];
+  return `${lines.join("\n")}\n\n`;
+}