Added phone sms webhook events

[ivan-pavlik]

This PR adds the following webhook events:

• phone.sms_campaign_number_opt_in
• phone.sms_campaign_number_opt_out
• phone.sms_etiquette_block
• phone.sms_etiquette_warn
• phone.sms_received
• phone.sms_sent
• phone.sms_sent_failed

Models:

• PhoneSmsEvent: base model for all added events with AccountId property
• again payload models used in sms webhooks are slightly different than models used in related sms API endpoints, so I've added base models with properties common for API endpoints and webhook events (SmsMessageBase, SmsParticipantBase, SmsOwnerBase), inherited existing models for API endpoints (SmsMessage, SmsHistoryParticipant, SmsParticipantOwner) and added webhook specific models (WebhookSmsMessage, WebhookSmsParticipant, WebhookSmsOwner).
• SmsOptStatus, SmsOptInStatus - new enums
• SmsCampaignNumbersOptStatus - used in webhook events and also can be used in related API endpoints
• WebhookSmsCampaignOptStatuses - 'object' model used in sms campaign webhook events payload
• WebhookSmsEtiquettePolicy - 'object' model used in sms etiquette webhook events payload

Unit tests:

• added unit tests for the new webhook events
• adjusted and aligned property values in phone sms webhook events json data to simplify checks

[Jericho]

Looks very good!

[Jericho]

🎉 This issue has been resolved in version 0.101.0 🎉

The release is available on:

• GitHub Release
• NuGet Package

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