Implemented voice call protocol plugin

[jihyungSong]

Discussed in #3

^{Originally posted by jihyungSong November 10, 2022}
Propose Date : 2022-11-10
Proposer : @jihyungSong @mintloveschoco

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Currently, Cloudforet can deliver event information to users through various channels to the Notification service. (https://github.com/cloudforet-io/notification)

The currently available notification protocol channels are as follows.

• Email
• Slack
• Telegram
• SMS (Short Message) from MZC

In addition to this, I propose voice call as a new notification channel.

In case of an urgent alarm event, it is a way to make sure the user is aware of an emergency through a direct phone call rather than a text-based delivery method.

In addition, this will be implemented based on AWS so that any AWS user can build and use itself (such as cloudformation), and will be implemented it the new Plugin.

Based on Amazon Connect, a cloud contact center service, We plan to implement it using the Amazon Polly service that can easily text to speech.

The new repository name will be named plugin-voicecall-noti-protocol according to the repository naming rules.