[PY-400][external] Move Meta Item & ItemQuery to folder

[JBWilkie]

Problem

Currently no Meta methods for moving items between folders

Solution

Introduced functions to do this for Meta Items & ItemQuery objects

Changelog

Meta methods to move Items & ItemQuery objects between folders

[linear]

PY-400 Move item to folder

ex.

# `item` is of type Item, within meta scope

item.move_to_folder('folder_name')

# `items` is of type ItemQuery
items = team.datasets[0].items.where(some_query)

items.priority('folder_name') # will move all items in query

[owencjones]

Comments to review, but not going to block a merge.