feat: add action to get slack name based on email

[denieler]

Description

Add github action to retrieve slack name from user email

Development checks

• Add changeset according to guidelines (if needed)

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• @toptal-anvil ping reviewers - Ping FX team for review

[changeset-bot]

🦋 Changeset detected

Latest commit: aa42b4c

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 1 package

Name	Type
davinci-github-actions	Minor

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[toptal-devbot]

Greetings from FX team, @denieler 👋

Thank you so much for contributing 🙇

We have got high priority ticket generated on our Kanban board so we will do our best to make your experience supreme!

What's next? We will collaborate using this workflow. For you this practically means making sure DONE criteria is met and responding promptly to code review comments 😉

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[TomasSlama]

the code looks good 👍, could you please also share the use case that we try to cover?

[denieler]

the code looks good 👍, could you please also share the use case that we try to cover?

@TomasSlama yes, I want to send slack messages to people, based on some GHA checks (which have only GH user emails/nicknames)

[denieler]

@toptal-anvil ping reviewers

[dmaklygin]

Good job! Thank you