Rashdf

* Fixes an issue where the `RasPlanHdf.get_results_volume_accounting_attrs` method returns an empty dictionary. 67
* Pins `zarr` dependency version to 2.18.2. A future release will need to be compatible with version 3.0.

Fixes an issue with typehints and docstrings with the 0.7.0 release.

Features
* Extract observed timeseries data at reference lines and reference points. Method added to `RasPlanHdf`: `observed_timeseries_input`

Features
* Generate Zarr metadata for mesh timeseries, reference line timeseries, and reference point timeseries data. Methods added to `RasPlanHdf`:
* `zmeta_mesh_cells_timeseries_output`
* `zmeta_mesh_faces_timeseries_output`
* `zmeta_reference_lines_timeseries_output`
* `zmeta_reference_points_timeseries_output`
* Renames mesh timeseries output methods for consistency; deprecates original names:
* `mesh_cells_timeseries_output` (old: `mesh_timeseries_output_cells`)
* `mesh_faces_timeseries_output` (old: `mesh_timeseries_output_faces`)
* Adds methods to return `DataFrame` objects of summary output data:
* `mesh_cells_summary_output`
* `mesh_faces_summary_output`

Features
* **Reference lines & points**
* Geometry
* Summary output
* Timeseries output
* **GeoPandas 1.0**: upgrades to GeoPandas 1.0+ (previously 0.14). At version 1.0, GeoPandas relies on `pyogrio` by default rather than Fiona for reading/writing data. Likewise, `rashdf` now installs with `pyogrio` as a transitive dependency of GeoPandas. Fiona can be optionally installed by the user. The "dev" dependency for `rashdf` explicitly includes Fiona and some unit tests specify it for writing output.

Features
Adds capabilities to export 1D data, including:
* Cross-sections
* River/reach lines
* Cross-section elevations
* 1D steady flow output