Raise ValueError in `_get_ordered_vertices()` with "mixed" order (#595)

* Raise a ValueError in `_get_ordered_vertices()` with `"mixed"` core dim order

* Replace ValueError with NotImplementedError

* [pre-commit.ci] auto fixes from pre-commit.com hooks

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Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>
Co-authored-by: Pascal Bourgault <bourgault.pascal@ouranos.ca>

Fix singleton coord in core dim orders (#592)

Support multiple grid mappings; Add new GridMapping dataclass (#586)

Co-authored-by: Claude <noreply@anthropic.com>

Update `bounds_to_vertices` to handle descending arrays (#579)

* Update `bounds_to_vertices` to handle descending arrays
Add `_get_ordered_vertices()` to handle extraction of unique vertex values in ascending order

* Update docstring

* Update `_get_ordered_vertices()` to preserve order of values

* Fix `_get_ordered_vertices()` to preserve leading dims
- Also handle strictly monotonic bounds

* [pre-commit.ci] auto fixes from pre-commit.com hooks

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* Fix casting issue with numpy 1.26.4

* Update docstrings for clarity

* [pre-commit.ci] auto fixes from pre-commit.com hooks

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* Fix logic for checking strictly monotonic

* Fix logic for checking strictly monotonic

* Delete qa/mvce.py

* Update `bounds_to_vertices to sort on coordinates
- Add `_get_core_dim_orders()` to get core dim orders for sorting vertices
- Update `_bounds_helper()` to accept `core_dim_orders` param
- Update `_get_ordered_vertices()` to sort on `core_dim_orders` param
- Fix `_get_ordered_vertices()` to get correct array values for vertices based on order of core dims

* [pre-commit.ci] auto fixes from pre-commit.com hooks

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* Fix 3d vertices test

* Add typecasting to prevent numpy 1.26.4 issue

* Add typecasting to prevent numpy 1.26.4 issue

* Add typecasting to prevent numpy 1.26.4 issue

* Fix mypy error expecting bool not np.bool

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one more type fix (#575)

FlagGrouper: Encapsulate instead of subclassing UniqueGrouper (#569)

Fix imports again (#565)

* Fix imports again

* try again

* yet agaoin

Update types (#564)

Fix Grouper import (#560)

* Fix import

* redo CI

* fix name

* fix min deps

* bump min xarray

* importorskip

Add pooch downloader to workaround readthedocs/readthedocs.org#11763 (#…

…547)