Allow adding the same type to typed pdc lists instead of using the ar…

[sovdeeth]

Problem

add {item} to item list data tag "x" of y would not work because the expr would only return arithmetic changers and items cannot be added to each other.

Solution

Uses the data type itself if the tag is a list and has a specified type, like adding 1 to {_list::*}.

Testing Completed

Manual confirmation

Supporting Information

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Completes: none
Related: none
AI assistance: none