Adding visual calc use case.

[edwardpcharles]

Adding a visual calculation use case. Ideally there would be a completely new page created for visual calc examples that then link to different examples.

[prmerger-automator]

@edwardpcharles : Thanks for your contribution! The author(s) and reviewer(s) have been notified to review your proposed change.

[learn-build-service-prod]

Learn Build status updates of commit d0e8c5e:

✅ Validation status: passed

File	Status	Preview URL	Details
powerbi-docs/transform-model/desktop-visual-calculations-overview.md	✅Succeeded
powerbi-docs/transform-model/media/desktop-visual-calculations-overview/desktop-visual-calculations-hex-example-01.png	✅Succeeded
powerbi-docs/transform-model/media/desktop-visual-calculations-overview/desktop-visual-calculations-hex-example-02.png	✅Succeeded
powerbi-docs/transform-model/media/desktop-visual-calculations-overview/desktop-visual-calculations-hex-example-03.png	✅Succeeded
powerbi-docs/transform-model/media/desktop-visual-calculations-overview/desktop-visual-calculations-hex-example-04.png	✅Succeeded
powerbi-docs/transform-model/media/desktop-visual-calculations-overview/desktop-visual-calculations-hex-example-05.png	✅Succeeded
powerbi-docs/transform-model/media/desktop-visual-calculations-overview/desktop-visual-calculations-hex-example-06.png	✅Succeeded
powerbi-docs/transform-model/media/desktop-visual-calculations-overview/desktop-visual-calculations-hex-example-07.png	✅Succeeded
powerbi-docs/transform-model/media/desktop-visual-calculations-overview/desktop-visual-calculations-hex-example-08.png	✅Succeeded
powerbi-docs/transform-model/media/desktop-visual-calculations-overview/desktop-visual-calculations-hex-example-09.png	✅Succeeded

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[prmerger-automator]

PRMerger Results

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[v-regandowner]

@davidiseminger - Can you review the proposed changes?

IMPORTANT: When the changes are ready for publication, adding a #sign-off comment is the best way to signal that the PR is ready for the review team to merge.

#label:"aq-pr-triaged"
@MicrosoftDocs/public-repo-pr-review-team