Add new pdf-truncate-batch-print action

[goebbe]

This spices-action provides truncated batch-print of PDF(s).

Use case: Printing PDF(s) without cover letters (at the start) and small print (at the end).
This is useful for printing/ storing e.g. invoices or bank statements etc. that typically start with a cover letters and end with small print. You can cut a specific number of pages at the start and from the end.
This action allows to batch print the pages between the cover-letter and the small print - it only prints the interesting part (the actual invoices).

This action saves the hassle to open, print, adapt page-range depending on the number of total pages - for each PDF individually.

Usage:

1. Select one or more similar PDF-files and select the action from context menu.
2. Type the number of pages to be truncated, at the start and from the end.
3. Choose the printer and choose between one-sided and two-sided printing.
   Now the batch-print will start. The same truncation will be applied to all PDF(s) during the batch-print.

Note:
If printer-driver-cups-pdf is installed, it is also possible to print to PDF, to obtain truncated PDF(s) - e.g. for storing stripped down versions of the PDF(s) electronically. Slim down the PDF(s) to their content.