added info how to run scripts/notebooks with poetry

split into usage of optional parameters and an example without a restriction, that will run for several days.

toar_rest_client: continued work on error handling.

under development

- added info to statistics applied during request to TOAR-DB

metadata:
- first round of documentation

started documentation as example

fixed some typos.

added comments to produce_data example

- fixed bug in plotting of station positions

README.md
- started rework of documentation of examples

.gitignore added directory used for examples

Create a basic structure and added the first content