feat: [Data Viz] Display Severity and Legend (CAMHI) (M2-7672)

[sultanofcardio]

• Tests for the changes have been added

📝 Description

🔗 Jira Ticket M2-7672

Note

This feature is behind the flag enableCahmiSubscaleScoring

This PR updates the dataviz summary page with the following new visualizations of subscale severity:

• The style of the points on the line chart have been updated to match the severity designs
• The severity of a point has been added to the tooltip for each point on the line chart
• The severity has been added to the additional information block of the expandable subscale card when the data is displayed using a line chart
• A legend has been added below the line chart explaining the severity point styles

📸 Screenshots

🪤 Peer Testing

TBD

✏️ Notes

The tooltips as designed are missing some elements from the existing tooltips which I think are necessary. I’ve decided to combine them in a way that I think keeps the spirit of the design

Design vs implementation:

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Unrelated lines on the chart can look like they’re connected to each other, but they’re just overlapping. This means that sometimes we won’t be able to easily tell the severity of a point without hovering

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The commit d2ebaa8 is present on this branch until #1922 is merged to develop. This is to avoid conflicts since I'm touching some of the same components

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