Scope out a Slack events API compatible feature

Description

Very cool feature to have: https://api.slack.com/events-api

QA Test Steps

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Status

Mana

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Assignee

Unassigned

QA Assignee

None

Reporter

Christopher Poile

Epic Link

Fix versions

Mattermost Team

Integrations

Sprint

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Labels

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QA Testing Areas

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GitHub Issue

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Components

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Configure