feat(react-list): add design-free List base hooks

[Dmytro Kirpa (dmytrokirpa)]

Summary

• add design-free useListBase_unstable and useListItemBase_unstable hooks
• export List context APIs and DOM validation utilities for headless composition
• add the react-list API report and package-owned Beachball change file

Validation

• yarn nx run react-list:type-check
• yarn nx run react-list:test --args="useListItem"

Stack

1. test(react-list): lock down ListItem behavior contract #36592
2. This PR
3. feat(react-headless-components-preview): add headless List #36591

[github-actions]

Pull request demo site: URL

[github-actions]

📊 Bundle size report

Package & Exports	Baseline (minified/GZIP)	PR	Change
react-components react-components: entire library	1.283 MB 322.098 kB	1.284 MB 322.401 kB	1.059 kB 303 B
react-list List	75.535 kB 23.403 kB	75.866 kB 23.518 kB	331 B 115 B
react-list ListItem	99.05 kB 30.27 kB	99.756 kB 30.449 kB	706 B 179 B

Unchanged fixtures

Package & Exports	Size (minified/GZIP)
react-components react-components: Button, FluentProvider & webLightTheme	67.461 kB 19.461 kB
react-components react-components: Accordion, Button, FluentProvider, Image, Menu, Popover	227.126 kB 68.407 kB
react-components react-components: FluentProvider & webLightTheme	40.684 kB 13.549 kB
react-portal-compat PortalCompatProvider	5.341 kB 2.146 kB
react-timepicker-compat TimePicker	142.027 kB 46.435 kB

_{🤖 This report was generated against d46cb5ca3426a5bbd49f9e3bb6653cbef06217fe}