Eotransform-xarray

- ResampleWithGauss updates now spatial coordinates y and x based on the geo transformation and size of the target area

- Updated README with a usage example
- Added API docs
- Added citation info file via CITATION.cff

https://eotransform-xarray.readthedocs.io/

- Introduce `Decoder` to decode arrays parallelized using numba
- Performance improvements of `ResampleWithGauss` by creating emptyoutput raster arrays and filling nans inside the parallel resample function
- Because of significant performance gains by just creating empty output rasters, removed the empty out raster factory as there is currently no need for it
- Bugfix where check for numba engine wasn't properly performed

pyyaml can't handle dataclass fields properly with default factories.

To be backwards compatible

- Improved performance of numba gaussian weight calculation
- Make `ProcessingConfig` a yaml object for easy config files
- Add option to specify resampling segments to `ProcessingConfig`
- Add parameter to `ResampleWithGauss` ctor to specify custom out raster factory