feat(mapOptionToKey): provide first helper

[code-forger]

Description

Some common use cases for the mapOptionToKey option can be covered by simple helpers

Motivation and Context

Provide simple ways to achieve common patterns.

How Has This Been Tested?

Unit tests

Types of Changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation (adding or updating documentation)
• Dependency update

Checklist:

• My change requires a change to the documentation and I have updated the documentation accordingly.
• My changes are in sync with the code style of this project.
• There aren't any other open Pull Requests for the same issue/update.
• These changes should be applied to a maintenance branch.
• I have added the Apache 2.0 license header to any new files created.

What is the Impact to Developers Using Fetchye?

Cleaner pattern for achieving this common usecase.

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