docs(storybook): add polygon story

[ckifer]

Description

Polygon story files and initial simple story following examples of other shapes.

Leave out undocumented "internal" props connectNulls and baseLinePoints. These show in the args table but aren't called out in the current documentation. I don't know enough about them to add proper descriptions to them.

Related Issue

Motivation and Context

Continue to document things in storybook

How Has This Been Tested?

See screenshot. Tested locally, tests continue to pass.

Screenshots (if appropriate):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have added tests to cover my changes.
• All new and existing tests passed.

[nikolasrieble]

Great first iteration. Can you please create a follow up tickets to document the two missing properties in storybook? Just so we not forget it.

[ckifer]

#3587

[ckifer]

Follow up issue created - merging