…2494)

* update repo to host metapackage

* run updated style checks

* fix import orders

* check matching versions for arviz-xyz

* fixes and readme updates start

* improvements to contributing guide

* tox check

* remove tests for duplicated namespaces

* update issue and PR templates

* update versions with SPEC0

Bumps the actions group with 1 update: [actions/checkout](https://github.com/actions/checkout).


Updates `actions/checkout` from 5 to 6
- [Release notes](https://github.com/actions/checkout/releases)
- [Changelog](https://github.com/actions/checkout/blob/main/CHANGELOG.md)
- [Commits](actions/checkout@v5...v6)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-version: '6'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: actions
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Bumps the actions group with 1 update: [actions/download-artifact](https://github.com/actions/download-artifact).


Updates `actions/download-artifact` from 6 to 7
- [Release notes](https://github.com/actions/download-artifact/releases)
- [Commits](actions/download-artifact@v6...v7)

---
updated-dependencies:
- dependency-name: actions/download-artifact
  dependency-version: '7'
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: actions
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

* Improve error message for mismatched ArviZ subpackage versions

* Improve ArviZ subpackage version mismatch error and add test

* Refine error message formatting and iteration

Expose from_netcdf and from_zarr functions as aliases for
xarray.open_datatree to maintain backward compatibility and
improve discoverability in the arviz namespace.

- from_netcdf: direct alias for xarray.open_datatree
- from_zarr: partial with engine="zarr" preset

Closes #2507

Signed-off-by: majiayu000 <[email protected]>

* proofreading

* proofreading

* fix trailing whitespace

* Update docs/source/user_guide/getting_started.md

Co-authored-by: Oriol Abril-Pla <[email protected]>

* address comments

---------

Co-authored-by: Oriol Abril-Pla <[email protected]>