Move emails to dedicated package (#3542)

* Add new package

* Add twenty-emails package

* Use generated files from twenty-emails in twenty-server

* Fix deleted file

* Import emails templates properly

packages/twenty-emails/tsup.index.tsx

@@ -0,0 +1,2 @@
+export * from './src/emails/clean-inactive-workspaces.email';
+export * from './src/emails/delete-inactive-workspaces.email';