Separate Hazard xarray reader into its own module (#1063)

* Move Hazard xarray reader and tests into separate module
* Deprecate `Hazard.from_raster_xarray_file`
* Make `Hazard.from_raster_xarray` handle files.
* Update tests
* Fix linter issues
* Update docstrings, docs, tests, and CHANGELOG.md
* Avoid .values accessor of DataArray

---------

Co-authored-by: emanuel-schmid <[email protected]>

Author: peanutfun

CHANGELOG.md

@@ -39,6 +39,7 @@ Removed:
 - World Bank indicator data is now downloaded directly from their API via the function `download_world_bank_indicator`, instead of relying on the `pandas-datareader` package [#1033](https://github.com/CLIMADA-project/climada_python/pull/1033)
 - `Exposures.write_hdf5` pickles geometry data in WKB format, which is faster and more sustainable. [#1051](https://github.com/CLIMADA-project/climada_python/pull/1051)
 - The online documentation has been completely overhauled, now uses PyData theme: [#977](https://github.com/CLIMADA-project/climada_python/pull/977)
+- Add `climada.hazard.xarray` module with helper structures for reading Hazard objects from `xarray` data [#1063](https://github.com/CLIMADA-project/climada_python/pull/1063)
 
 ### Fixed
 
@@ -47,6 +48,8 @@ Removed:
 
 ### Deprecated
 
+- `Hazard.from_xarray_raster_file`. Use `Hazard.from_xarray_raster` and pass the file path as `data` argument [#1063](https://github.com/CLIMADA-project/climada_python/pull/1063)
+
 ### Removed
 
 - `climada.util.interpolation.round_to_sig_digits` [#1012](https://github.com/CLIMADA-project/climada_python/pull/1012)