Load and store of scenes from JSON files in object memory

Store

• In ArmarXObjects, we have a folder (ToDo: discuss where) where scenes are stored in a JSON format similar to these: https://gitlab.com/h2t/ResearchProjects/oml/OML/-/tree/master/data/OML/scenes
• These files are stored by the Scene Editor when storing a snapshot
• New feature: The Object Memory's Remote GUI has a text field + button to export the current instances in this format in the correct folder

Load

• New: The Object Memory has property to specify the relative path to the scene JSON file to load on start up.
• New: Load button in Remote GUI