* feat: env variable added in infra-config for smtp enable status
* feat: event emitter added
* feat: added advance mailer configurations from infra config
* test: fix test cases
* feat: added query to see is smtp enabled or not
* feat: email auth provider disabled on smtp disable
* chore: restrict on update directly instead of dedicated mutation
* fix: feedback resolved
* chore: modify mailer module
* chore: error handle in mailer functions
* chore: removed unused imports
* chore: remove event-emit
* chore: update env example
* test: fix broken test cases
* chore: feedback resolved
* chore: isSMTPEnabled moved to infra config resolver
* fix: email can not reenable if smtp not enabled