Add Collapse component

[sjavora]

Should more things be customizable? Mainly thinking of the title/header and whether the separator should be hideable...

Resolves #352.

Screen.Recording.2022-12-19.at.12.23.33.mov

[PavelHolec]

The version with fixed Text is good enough for what Orbit provides in design. In real usage, the non-collapsed content will be more custom than simple text though.

On top of the existing String based init, the component should accept two ViewBuilder arguments - the collapsed version (header) and the expanded content (these two will be concatenated in the VStack). The String-based init will then call this more generic one.

[sjavora]

Ok, what about some highlight on touchdown for the header? Currently there is none, but maybe there should be something similar to Tile?

[sjavora]

@PavelHolec updated with header content.

[PavelHolec]

Ok, what about some highlight on touchdown for the header? Currently there is none, but maybe there should be something similar to Tile?

That would be nice. The highlight could be done as a background behind the header, driven by the Button isPressed state. This would expect the header to have a transparent background though (similar to ListChoice). It would be worth deciding how to unify this behaviour with the similar components like Tile/ListChoice in a follow-up.