Xradar

* FIX: only skip setting cf-attributes if both gain and offset are unused ({pull}`85`) by [kmuehlbauer](https://github.com/kmuehlbauer)

* ENH: add IRIS ``DB_VELC`` decoding and tests ({issue}`78`), ({pull}`83`) by [kmuehlbauer](https://github.com/kmuehlbauer)
* FIX: furuno backend inconsistencies ({issue}`77`), ({pull}`82`) by [kmuehlbauer](https://github.com/kmuehlbauer)
* FIX: ODIM_H5 backend inconsistencies ({issue}`80`), ({pull}`81`) by [kmuehlbauer](https://github.com/kmuehlbauer)

* fix ``_Undetect``/``_FillValue`` in odim writer ({pull}`71`) by [kmuehlbauer](https://github.com/kmuehlbauer)
* port more backend tests from wradlib ({pull}`73`) by [kmuehlbauer](https://github.com/kmuehlbauer)

* add WRN110 scn format to Furuno reader ({pull}`65`) by [kmuehlbauer](https://github.com/kmuehlbauer)
* Adapt to new build process, pyproject.toml only, use `ruff` for linting ({pull}`67`) by [kmuehlbauer](https://github.com/kmuehlbauer)

* add ODIM_H5 exporter ({pull}`39`) by [kmuehlbauer](https://github.com/kmuehlbauer)
* fetch radar data from open-radar-data ({pull}`44`) by [kmuehlbauer](https://github.com/kmuehlbauer)
* align readers with CfRadial2, add CfRadial2 exporter ({pull}`45`), ({pull}`49`), ({pull}`53`), ({pull}`56`), ({pull}`57`) and ({pull}`58`) by [kmuehlbauer](https://github.com/kmuehlbauer)
* add georeference accessor, update examples ({pull}`60`), ({pull}`61`) by [mgrover1](https://github.com/mgrover1)
* refactored and partly reimplemented angle reindexing ({issue}`55`), ({pull}`62`) by [kmuehlbauer](https://github.com/kmuehlbauer)

* add GAMIC HDF5 importer ({pull}`29`) by [kmuehlbauer](https://github.com/kmuehlbauer)
* add Furuno SCN/SCNX importer ({pull}`30`) by [kmuehlbauer](https://github.com/kmuehlbauer)
* add Rainbow5 importer ({pull}`32`) by [kmuehlbauer](https://github.com/kmuehlbauer)
* add Iris/Sigmet importer ({pull}`33`) by [kmuehlbauer](https://github.com/kmuehlbauer)
* add georeferencing (AEQD) ({pull}`28`) by [mgrover1](https://github.com/mgrover1)