Multi ts in multomodal case

[Dreamlone]

The framework has the multi_ts data type.

However, when developing functionality for multimodal data processing, the data_source_ts node is put on a par with the muti_ts data.

There is a need: 1) Prepare an example of using multi_ts data in multimodal mode; 2) If necessary, implement data_source_multi_ts node