Organization information : need addition to STAPlus model

[sgrellet]

From 08/08/2023 webconf:

• When mapping WQX to OMS then ST Api, 'Party' in STA Plus (https://raw.githubusercontent.com/securedimensions/FROST-Server-PLUS/develop/doc/STAplusSensingEntities.png) is the closest class to Organization.

We would need to add properties to STAPlus:Party