Wetterdienst

Feature
- Change cli base to click
- Add support for wetterdienst core API in cli and restapi
- Export: Use InfluxDBClient instead of DataFrameClient and improve connection handling with InfluxDB 1.x
- Export: Add support for InfluxDB 2.x
- Add show() method with basic information on the wetterdienst instance

Fix
- Fix InfluxDB export by skipping empty fields

Refactor
- Make tidy method a abstract core method of Values class

Fix
- Fix DWD Mosmix generator to return all contained dataframes

Feature
- Add origin and si unit mappings to services
- Use argument "si_units" in request classes to convert origin units to si, set to default
- Improve caching behaviour by introducing optional ``WD_CACHE_DIR`` and ``WD_CACHE_DISABLE`` environment variables. Thanks, meteoDaniel!
- Add baseline test for ECCC observations
- Add DWD Observation hourly moisture to catalogue

Feature
- Add capability to export data to Zarr format
- Add Wetterdienst Explorer UI. Thanks, meteoDaniel!
- Add MAC ARM64 supoort with dependency restrictions
- Add support for stations filtering via bbox and name
- Add support for units in distance filtering

Refactor
- Rename station_name to name
- Rename filter methods to .filter_by_station_id and .filter_by_name, use same convention for bbox, filter_by_rank (previously nearby_number), filter_by_distance (nearby_distance)

Fix
- Radar: Verify HDF5 responses instead of returning invalid data
- Mosmix: Use cached stations to improve performance

Refactor
- Make .discover return lowercase parameters and datasets

Refactor
- Use direct mapping to get a parameter set for a parameter
- Rename DwdObservationParameterSet to DwdObservationDataset as well as corresponding columns
- Merge metadata access into Request
- Repair CLI and I/O subsystem
- Add capability to export to Feather- and Parquet-files to I/O subsystem
- Deprecate support for Python 3.6
- Add ``--reload`` parameter to ``wetterdienst restapi`` for supporting development
- Improve spreadsheet export
- Increase I/O subsystem test coverage
- Make all DWD observation field names lowercase
- Make all DWD forecast (mosmix) field names lowercase
- Rename humanize_parameters to humanize and tidy_data to tidy

Feature
- Add Environment and Climate Change Canada API

Fix
- Radar: Use OPERA as data source for improved list of radar sites