Eotransform-xarray

- `DropDims` maps to xarray's `drop_dims`
- `DropSel` maps to xarray's `drop_sel`
- `Reduce` maps to xarray's `reduce`
- `Squeeze` maps to xarrays `squeeze`
- `SendToStream` allows to send array data to an input stream and provides an according interface

- use `load_in_resampling_params` to load and provide parameters for input parameter loading
- use `load_out_resampling_params` to load and provide parameters for output parameter loading

- We now detect if a legacy formatted GeoTif has its scale factor specified with the correct name, but as a string

- Support tags parsing via `rioxarray` and allow upgrade to latest version
- Tags are now part of the top `xarray.attrs` property and not nested inside a special 'tag' dictionary, to match `rioxarray`
- Removed the special rasterio open kwargs parameter from all raster loading function, as this is all now handled via `rioxarray.open_rasterio` interface

- Implement `MaskWhere` to produce masks in a simple and general way
- Extract the load tif functionality into functions
- Introduce `TransformerOfDataset` protocol
- Provide `ApplyToDataVar` transformer to transform specific variables
of a dataset