feat(scripts): add send-email script using nodemailer

Add a sandboxed send-email.js workflow script with SMTP settings
exposed via script config and password loaded from named secrets.
Allow nodemailer in the script sandbox require whitelist.

Co-authored-by: Nasyarobby Putra <nasyarobby@gmail.com>

packages/server/script-sandbox.js

@@ -12,7 +12,13 @@ import { getSecretPlaintext } from "./secrets-store.js";
 
 const hostRequire = createRequire(import.meta.url);
 
-const ALLOWED_MODULES = new Set(["axios", "jsonata", "node-html-parser", "rss-parser"]);
+const ALLOWED_MODULES = new Set([
+  "axios",
+  "jsonata",
+  "node-html-parser",
+  "nodemailer",
+  "rss-parser",
+]);
 
 const BUILTIN_NAMES = [
   "Infinity",