* do not pickle cached hash of arrays

* no clue why this works

* remove unneeded changes

* add an explanation

* add simple test

* add another test

* copy getstate/setstate implementation from dataclasses

* typo?

* DictOfNamedArrays: better repr, keys

* add tags to repr

* make keys() abstract

* add to doc

* fix lint

* remove invalid requirements.txt pytools version specification

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Co-authored-by: Andreas Klöckner <inform@tiker.net>

* change attrs to dataclasses

* post-merge fix

* more fixes

* switch to array_dataclass

* use _augment_array_dataclass

* restore attribute validation

* mypy?

* Disable pylint invalid-field-call

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Co-authored-by: Andreas Kloeckner <inform@tiker.net>

This reverts commit 3c90e784.

This reverts commit a0da6dc9.

* use numpy 2 type promotion directly

* fix lint

* add comment & test regarding np.result_type with pytato arrays

* adjust README

* revert old_numpy test adjustment (tested manually with numpy 1.26)

* remove comment

* Add new propagation logic

* Fix failing tests

* Actually fix failing tests

* linter fixes + other fixes

* use pytools to generate propagation graph

* add pytools 2024.1.14 as dependency

* add correct pytools version to requirements.txt

* remove dependencies in pyproject.toml, add dependency on pytools 2024.1.14 to setup.py

* IgnoredForPropagationTag -> AxisIgnoredForPropagationTag; update docs

* change wording

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Co-authored-by: Andreas Klöckner <inform@tiker.net>

* First shot at implementing 'F' ordered array reshapes

* Remove restriction on reshape order

* Refactor to unify paths

* Slight adjustment

* Update comment wording

* Rough draft of old -> new axis mapping

* Absorb new tag propagation

* Revert changes

* don't linearize everything

* pass tests with new reshaped indices getter

* revert change that belongs to another branch

* fix mypy issues

* fix failing arraycontext test

* fix failing flake8 test

* fixes

* remove unnecessary import

* ruff fixes + small change

* Stopped in the middle

* improved index expression generation

* add test for F ordered reshapes

* remove redundant scalar check

* Improve reshape docs

* Goodbye unnecessary variable

* Way more reshape test coverage

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Co-authored-by: Andreas Kloeckner <inform@tiker.net>