Is it a good idea to add a beforeRetry callback to the retry operator?

[tbontb-iaq]

Add a beforeRetry property in RetryConfig:

interface RetryConfig {
  count?: number
  delay?: number | ((error: any, retryCount: number) => ObservableInput<any>)
  resetOnSuccess?: boolean
  beforeRetry?: (reason?: unknown) => void
}

Pass captured error to the callback before each retry, which can be used to record error info, etc.