feat: ms teams notifications logic from onroutebc

[cberg-aot]

Description

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Fixes # (issue)

Type of change

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• [ ] Bug fix (non-breaking change which fixes an issue)
• [x] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [ ] This change requires a documentation update

How Has This Been Tested?

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• [ ] Test A
• [ ] Test B

Checklist

• [x] I have read the CONTRIBUTING doc
• [x] I have performed a self-review of my own code
• [x] I have commented my code, particularly in hard-to-understand areas
• [ ] I have made corresponding changes to the documentation
• [ ] My changes generate no new warnings
• [ ] I have added tests that prove my fix is effective or that my feature works
• [ ] New and existing unit tests pass locally with my changes
• [ ] Any dependent changes have already been accepted and merged

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[cberg-aot]

Testing this will require the env var MS_TEAMS_WEBHOOK_URI.

https://learn.microsoft.com/en-us/microsoftteams/platform/webhooks-and-connectors/how-to/add-incoming-webhook?tabs=newteams%2Cdotnet

cc @DerekRoberts

[cberg-aot]

https://learn.microsoft.com/en-us/outlook/actionable-messages/message-card-reference

This should be documented re: why we are not using adaptive cards in this action