added ice interface for querying symbolic scene memory

python/skills/skills/episodic_verbalization.py

...ls/skills/episodic_verbalization_core/em/armarx_lt_mem.py

python/skills/skills/query_symbolic_scene_memory.py

...eech/skills/object_last_seen_at/core/ObjectLastSeenAt.cpp

...speech/skills/object_last_seen_at/core/ObjectLastSeenAt.h

...ch/skills/object_last_seen_at/skills/ObjectLastSeenAt.cpp

...eech/skills/object_last_seen_at/skills/ObjectLastSeenAt.h