* Implement new title line addition for subtotals
Added functionality to handle adding a new title line for the subtotals module, including input processing and document generation.
* Add parameters to addline method in fichinter class
* Add special_code to fichinterligne class
* Update copyright notices in commonsubtotal.class.php
Added copyright notice for Charlene Benke for 2025.
* Remove extra blank line in fichinterligne.class.php
* Change special_code to be an integer in SQL query
* Refactor intervention detail display logic
Refactor code for better readability and maintainability by removing duplicate lines and organizing the logic for displaying intervention details.
* Decode extraparams to get subtotal options
* Change default value of special_code to 0
* NEW : add product_type field on fichinter (preparing subtotal)
Added product_type to SQL queries for fetch, insert, and update methods.
field already present on table, so let start add subtotal on interventionals
* Update fichinterligne.class.php
* Update copyright information in card-rec.php
Updated copyright year and name for Charlie Benke.
* Update fichinterligne.class.php
* Update fichinterligne.class.php
* Update fichinterligne.class.php
* Update fichinterligne.class.php
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Co-authored-by: Laurent Destailleur <eldy@destailleur.fr>
* Moved FichinterLigne class to separate file
* Fixed class properties PHPDoc
* Updated PHPDoc
* Fixed author id usage
* Fixed user author id
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Co-authored-by: Laurent Destailleur <eldy@destailleur.fr>
