GraphQL for ProductAlerts module

[vmalyk]

I see Magento have done a lot of work regarding cover all Magento community features by GraphQL. But I see 1 feature has't covered - it's Product Alerts subscriptions and notify customer about back to stock and change price. It'll be great to get these mutations:

type Mutation {
      subcribeProductAlertStock(productId: Int!): ProductAlert
      unsubcribeProductAlertStock(productId: Int!): Boolean
      subcribeProductAlertPrice(productId: Int!): ProductAlert
      unsubcribeProductAlertPrice(productId: Int!): Boolean
} 

[m2-assistant[bot]]

Hi @vmalyk. Thank you for your report. To help us process this issue please make sure that you provided sufficient information.

Please, add a comment to assign the issue: @magento I am working on this

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[vmalyk]

@magento I am working on this