ComboBoxNormalized - @deephaven/components

[bmingles]

Supporting windowed data in Spectrum collection components requires an array of data providing at least a key for every item in the collection. We do this in other components via a NormalizedItem interface that always provides a key and optionally provides an item prop that can be lazy loaded based on the current data viewport.

Create ComboBoxNormalized component in @deephaven/components to handle NormalizedItem data.