[terra-flowsheet-data-grid] Added column highlighting for flowsheet grids

[sugan2416]

Summary

What was changed:

• Added column highlighting (green and orange) for flowsheet grids.
• Updated terra-table lowlight light zebra strap colour to dark grey.

Why it was changed:

• Column highlighting feature request from clinical charting.
• Updated terra-table lowlight light zebra strap colour to dark grey to improve colour contrast.

Testing

This change was tested using:

• WDIO
• Jest
• Visual testing (please attach a screenshot or recording)
• Other (please describe below)
• No tests are needed

Reviews

In addition to engineering reviews, this PR needs:

• UX review
• Accessibility review
• Functional review

Additional Details

This PR resolves:

UXPLATFORM-9542

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@cerner/terra

[saket2403]

The new props should only be visible on doc site for flowsheet-data-grid and everywhere else it should be private right?

[sugan2416]

The new props should only be visible on doc site for flowsheet-data-grid and everywhere else it should be private right?

Yes. Changed in f316f91

[eawww]

Commented on the API changes as well as a few other things.

Additionally, there's a few a11y requirements that need to be met:

• Column header cell also needs its visually hidden text to include indication that the column is highlighted. Consumer should be able to provide a string label to append a meaningful indication like "most recent time" or "selected time". I believe that's what these are intended to represent. Clarification should be sought on this so the examples can be show real-world applications.

• Column header needs a visual indication other than color to show the column's highlight and differentiate the colors from each other. Stella timeline uses a circle and a square icon. I know that's not ideal so design should be consulted on this.

[eawww]

Also hover and select states of cells in highlighted columns should still have the border

[sugan2416]

Also hover and select states of cells in highlighted columns should still have the border

Fixed in d16d6e9