Charts: Add SegmentedBar component

[annacmc]

Proposed changes:

• Add new SegmentedBar component for displaying horizontal segmented progress bars
• Supports proportional and equal-width segment modes
• Includes marker indicator for showing target/threshold positions
• Tooltips, custom colors, and label formatting support

Other information:

• Have you written new tests for your changes, if applicable?
• Have you checked the E2E test CI results, and verified that your changes do not break them?
• Have you tested your changes on WordPress.com, if applicable (if so, you'll see a generated comment below with a script to run)?

Does this pull request change what data or activity we track or use?

No, it does not.

Testing instructions:

SegmentedBar Component:

1. Go to Storybook -> JS Packages -> Charts -> Types -> Segmented Bar
2. Test all three stories: Default, EqualMode, WithMarker
3. Use Storybook controls to explore different configurations:
   • Toggle between proportional and equal modes
   • Adjust height, gap, borderRadius
   • Enable/disable tooltips and labels
   • Add/configure marker indicator
4. Verify responsive behavior at different container widths

[github-actions]

Are you an Automattician? Please test your changes on all WordPress.com environments to help mitigate accidental explosions.

• To test on WoA, go to the Plugins menu on a WoA dev site. Click on the "Upload" button and follow the upgrade flow to be able to upload, install, and activate the Jetpack Beta plugin. Once the plugin is active, go to Jetpack > Jetpack Beta, select your plugin (Jetpack), and enable the add/new-chart-categorybar branch.
• To test on Simple, run the following command on your sandbox:

bin/jetpack-downloader test jetpack add/new-chart-categorybar

Interested in more tips and information?

• In your local development environment, use the jetpack rsync command to sync your changes to a WoA dev blog.
• Read more about our development workflow here: PCYsg-eg0-p2
• Figure out when your changes will be shipped to customers here: PCYsg-eg5-p2

[github-actions]

Thank you for your PR!

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Follow this PR Review Process:

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[jp-launch-control]

Code Coverage Summary

3 files are newly checked for coverage.

File	Coverage
projects/js-packages/charts/src/components/segmented-bar/segmented-bar.tsx	71/79 (89.87%) 💚
projects/js-packages/charts/src/components/segmented-bar/index.ts	0/0 (—%) 🤷

Full summary · PHP report · JS report