[operators] move ComponentProjection to constructions
[operators] move numpy operators to basic
[operators] move ConstantOperator to constructions
[operators] move ProjectedOperator, ProjectedLinearOperator to basic
[operators] move FixedParameterOperator to constructions
[operators] add projected() method to OperatorBase
[remote] add projected() method to RemoteOperator
[operators] eliminate project_operator()
documentation update