[List]: update single-select icons

[ashetland]

Check existing issues

• I have checked for existing issues to avoid duplicates

Description

Update single-select icons to align with Table. List was previously updated to match Dropdown, but the small dot is less ideal for content-rich settings where the selection state needs to be more prominent. Small dots are also commonly used to indicate activity.

While not a breaking change by itself, this should be paired with #7100 and #9173.

Acceptance Criteria

For selection-appearance="icon" and selection-mode="single"`:

• unselected should use icon="circle"
• selected should use "icon="circle-f"

Relevant Info

No response

Which Component

List
List Item

Example Use Case

No response

Priority impact

p4 - not time sensitive

Calcite package

• @esri/calcite-components
• @esri/calcite-components-angular
• @esri/calcite-components-react
• @esri/calcite-design-tokens
• @esri/eslint-plugin-calcite-components

Esri team

Calcite (design)

[ashetland]

cc @driskull