documentation on license for aviation data in wis2box

[maaikelimper]

@efucile to indicate how we want add information about the aviation license ? should this be part of wis2box-webapp or we put it in the documentation of wis2box only ?

@amilan17 to help provide text for this

[tomkralidis]

2025-07-29:

• aviation docs to go on community
• wis2box specific license addition in documentation (for recommended data)