Return NamedTuple rather than tuple.

[logston]

It would be nice to return a NamedTuple instead of a tuple here:

scim2-filter-parser/src/scim2_filter_parser/transpilers/sql.py

Line 148 in 7ddc216

attr_path_tuple = (attr_name_value, sub_attr_value, uri_value)

This way parts of each path could be accessed by name rather than by index in the tuple.