feat: terminal-native torrent discovery TUI

Curated, multi-source torrent search and download from the terminal:
concurrent search across built-in sources with streamed, source-tagged
results; a download-only webtorrent engine with true pause/resume and
restart recovery; magnet paste; and a calm Ink + React TUI. No indexer
server, no setup.

tsup.config.ts

@@ -0,0 +1,19 @@
+import { defineConfig } from "tsup";
+
+export default defineConfig({
+  entry: ["src/index.tsx"],
+  format: ["esm"],
+  target: "node22",
+  platform: "node",
+  banner: { js: "#!/usr/bin/env node" },
+  clean: true,
+  sourcemap: false,
+  dts: false,
+  splitting: false,
+  shims: false,
+  minify: true,
+  esbuildOptions(options) {
+    options.jsx = "automatic";
+    options.jsxImportSource = "react";
+  },
+});