Moving LegendScaleActor to Annotation

src/Cxx.md

src/Cxx/Annotation/LegendScaleActor.cxx

src/Cxx/Annotation/LegendScaleActor.md

src/Java.md

src/Java/Annotation/LegendScaleActor.java

src/Java/Annotation/LegendScaleActor.md

src/PythonicAPI.md

src/PythonicAPI/Annotation/LegendScaleActor.md

src/PythonicAPI/Annotation/LegendScaleActor.py