[ENHANCEMENT] Use areaOpacity for sparkline from theme

[abelyakin]

Description

Minor change that makes sparkline use areaOpacity from theme. Same as other sparkline visual settings.

This PR depends on perses/shared#49

Checklist

• Pull request has a descriptive title and context useful to a reviewer.
• Pull request title follows the [<catalog_entry>] <commit message> naming convention using one of the
  following catalog_entry values: FEATURE, ENHANCEMENT, BUGFIX, BREAKINGCHANGE, DOC,IGNORE.
• All commits have DCO signoffs.

UI Changes

• Changes that impact the UI include screenshots and/or screencasts of the relevant changes.
• Code follows the UI guidelines.

[Gladorme]

We probably want to have opacity defined in StatChartSparklineOptions too 🤔

[abelyakin]

Agreed. I added areaOpacity to StatChartSparklineOptions and wired it as an override (theme as default) for consistency with width.

[Gladorme]

lgtm, but it will need new shared release before merging

[Gladorme]

Ah no it will need to be added on CUE model and Go sdk too.
For editor, it can be added later :)

[shahrokni]

@abelyakin
Thank you for the contribution.
It seems you have some failed pipelines.
I think if you rebase main the error should go away, as the type should be available. No?

[abelyakin]

Will fix tomorrow 👍

[Nexucis]

Hello @abelyakin,

any chance you would like to continue to work on this PR ? I think the feature is still valid and wanted here !

[abelyakin]

Hi, @Nexucis
sorry missed that one. will take in my plan for next week