Support output transformation within the duplicate alteration

[Seddryck]

At the moment, it's possible to add columns for index and total, it should also be helpful to add flags (boolean) to specify if the row is the original and if the predicate is true or false (meaning if the row must be duplicated).

<output column="Value" value="is-original">
<output column="Value" value="is-duplicated">

On top of this, it should be possible to override the value of some existing columns. Typically you're using a duplicate to transform a single yearly value into twelve monthly values but by doing this you are also dividing by twelve the yearly value.

<output column="Value" value="script">
   <script language="native">
        [Value] | numeric-to-divide(12)
   </script>
</output>

[Seddryck]

Implemented and documented in 1.23.0-beta.68 or on nuget via Update-Package NBi.Framework -version 1.23.0-beta0068.