Audit GArrow and Arrow API alignment

[ilijapuaca]

Majority of the current GArrow API is aligned with the API that Arrow provides. There are a few inconsistencies that were introduced in order to reduce the complexity of the API for the need of initial release.

Arrow uses builder-style API that in order to build up arrays, where ArrayData type plays a key role in accessing the array data, and abstracting the types away completely. For simplicity sake, current Array implementation takes the underlying data as a constructor argument