Change Material3 attribution button to an attribution bar visible by default

[sargunv]

See discussion in maplibre/maplibre-native#2600

probably depends on #164

[westnordost]

On web it is usually no issue to display all attribution in one line. Still, the list of necessary attribution can in some cases be very long. If that attribution bar/button is also used on small screens, something should be done if it doesn't fit. I'd propose this:

1. Show the info button as a round button (i.e. like the compass button but smaller), aligned to the end side, not smaller than the attribution text height or ideally actually the same height.
2. Like on web, from the button a rounded bar extends towards the start side with the attribution text on it. If the text length exceeds the available space, an "…" is shown at the end.
3. When the map is interacted (after a certain minimum delay?), the bar quickly slides into the info button. Maybe the info button could have an unobtrusive animation that helps with the metaphor that it slid "into" the button, e.g. a short scale up, scale back down springy.
4. On info button press, the bar doesn't slide back out, instead, the attribution dialog is shown.

[westnordost]

All OpenStreetMap contributors will be thankful for a change that makes the attribution better visible by default. Thumbs up for that!