Feature: Add support for determining columns in FSS Read programs.
Implement a new feature for determining how many columns total are available for some Content.
Update the specifications accordingly.
The term "columns" has been added to designate this concept of the now of column sets within some Content.
Previously, this was weakly named.
The select functionality "--select" allows for selecting these columns but there has been no way to know how many columns exist.
This is not a good design for scripting and similar usage.
By providing a total number of columns, the select function becomes more complete and useful.
When columns is specified without any particular Object specified, then the maximum columns length for all Content is printed.
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