BREAKING CHANGE: Remove sendEmailWorkflow, add immediate processing to sendEmailTask

- Remove entire workflows directory and sendEmailWorkflow
- Factor out email processing logic into reusable utilities (emailProcessor.ts)
- Add processImmediately option to sendEmailTask input schema
- Update sendEmailTask to process emails immediately when requested
- Update processEmailsTask to use shared processing utilities
- Remove workflow-related exports and plugin configuration
- Simplify documentation to focus on unified task approach
- Export new email processing utilities (processEmailById, processAllEmails)
- Bump version to 0.4.0 (breaking change - workflows removed)

Migration: Use sendEmailTask with processImmediately: true instead of sendEmailWorkflow

src/index.ts

@@ -15,10 +15,6 @@ export { default as Emails } from './collections/Emails.js'
 export { mailingJobs, sendEmailJob } from './jobs/index.js'
 export type { SendEmailTaskInput } from './jobs/sendEmailTask.js'
 
-// Workflows (includes the send email workflow)
-export { mailingWorkflows, sendEmailWorkflow } from './workflows/index.js'
-export type { SendEmailWorkflowInput } from './workflows/sendEmailWorkflow.js'
-
 // Main email sending function
 export { sendEmail, type SendEmailOptions } from './sendEmail.js'
 export { default as sendEmailDefault } from './sendEmail.js'
@@ -30,4 +26,7 @@ export {
   processEmails,
   retryFailedEmails,
   parseAndValidateEmails,
-} from './utils/helpers.js'
+} from './utils/helpers.js'
+
+// Email processing utilities
+export { processEmailById, processAllEmails } from './utils/emailProcessor.js'