add a range facet component for few values (a, b, c…)

[alexgarel]

This use the same aggregation API as normal facet.

Add a facet component akin to searchalicious-facet-terms named searchalicious-facet-terms-range

Instead of displaying a list of checkbox, it displays a range selector (a line with two selectors: one for the min the other for the max)

something like:

Extra: The numbers of items could be used to generate a small bargraph above the range selector.

[alexgarel]

Note: maybe there is already existing open source web components for the selection widget, try to reuse an existing one, if possible.