Implement `fcm` module in TeamMail project

[hoangdat]

Desc:

• Docs: https://github.com/linagora/tmail-backend/blob/master/docs/modules/ROOT/pages/tmail-backend/jmap-extensions/pushWithFirebase.adoc
• Contracts:
  • set: https://github.com/linagora/tmail-backend/blob/master/tmail-backend/integration-tests/jmap/jmap-integration-tests-common/src/main/scala/com/linagora/tmail/james/common/FirebaseSubscriptionSetMethodContract.scala
  • get: https://github.com/linagora/tmail-backend/blob/master/tmail-backend/integration-tests/jmap/jmap-integration-tests-common/src/main/scala/com/linagora/tmail/james/common/FirebaseSubscriptionGetMethodContract.scala

DoD:

• [ ] add fcm module in project
• [ ] implement FirebaseSubscriptionSetMethod
• [ ] implement FirebaseSubscriptionGetMethod
• [ ] tests

[hoangdat]

@chibenwa FirebaseSubscription is available in preprod?

[hoangdat]

2HD