templater: implement _hybrid.__contains__ so that ifcontains can accept dict d8fb835376d1 is fine for "{revset()}", but "i.values()[0]" does not work if each item has more than one values such as "{bookmarks}". This fixes the problem by using list.__contains__ or dict.__contains__ appropriately.

templatekw: keep raw list or dict in _hybrid object This will allow us to handle bookmarks, extras and copies properly in "ifcontains()" and "get()".

templatekw: give name to lambda that constructs variables map of templater The constructed list is useless for "ifcontains()" and "get()". Instead, makemap() and raw dict will be passed to _hybrid object.