Add mailing plugin with templates, outbox, and job processing

src/index.ts

@@ -0,0 +1,25 @@
+// Main plugin export
+export { default as mailingPlugin } from './plugin'
+export { mailingPlugin } from './plugin'
+
+// Types
+export * from './types'
+
+// Services
+export { MailingService } from './services/MailingService'
+
+// Collections
+export { default as EmailTemplates } from './collections/EmailTemplates'
+export { default as EmailOutbox } from './collections/EmailOutbox'
+
+// Jobs
+export * from './jobs'
+
+// Utility functions for developers
+export {
+  getMailing,
+  sendEmail,
+  scheduleEmail,
+  processOutbox,
+  retryFailedEmails,
+} from './utils/helpers'