[2SP] GR: Implement a GR block that performs data chunking

[ivan-cukic]

The block should get the data as a continuous stream of type T, and chunk/cut it between tags, or on custom defined points. The chunks should be exported as DataSet<T>.

[RalphSteinhagen]

Intermediate result:

pending: FAIR style filtering (requires runtime configurable expression evaluation), DataSet<float> export (needs Plugin system update)