In `library`, add `expand button` component (v3.2.0)

[pylapp]

Description

Verbatims from @MaximeTonnerre:

Version 2.6 of the design tokens is required for the development of this update.
The loader frame has been renamed to Progress indicator container.
It now contains the new Circular Progress Indicator component.

See Figma specifications

[pylapp]

Caution

on hold until #1396 implements (tokens v2.6)