Hints

hints warn the user about:
* list case-insensitive matches in DAS cache (DBS3 is case sensistive)
* list dbs instances where the dataset pattern matches with example datasets

**do NOT mege yet**

**TODO:**
- [x] add option in config to enable/disable
- [x] when directly interpreting 1 keyword input as "dataset" patterns, having the hints in place we do not need to check if dataset pattern is only in current dbs instance, these "hints" would be provided during execution of DAS query
  - if dataset is matched in current instance, query for it imediately, on no results (e.g. its in different instance), user will have the hints