…ns (#345)

* feat: Let default_copy also copy PlaceholderRelationFields

* Clarify comment

* Call copy_relations if it exists in verisioned model

* Update tests

* Fix indent

* Fix test

* Update page content copy

* Fix creation_date for page content

* Fix linting issues

* More ruff fixes

* fix test

* Update tests/test_datastructures.py

Co-authored-by: sourcery-ai[bot] <58596630+sourcery-ai[bot]@users.noreply.github.com>

* Improve tests

---------

Co-authored-by: sourcery-ai[bot] <58596630+sourcery-ai[bot]@users.noreply.github.com>

100% translated source file: 'django.po'
on 'ru'.

Co-authored-by: transifex-integration[bot] <43880903+transifex-integration[bot]@users.noreply.github.com>

* Only show language menu for more than one language

* fix ruff issues

100% translated source file: 'django.po'
on 'nl'.

Co-authored-by: transifex-integration[bot] <43880903+transifex-integration[bot]@users.noreply.github.com>

100% translated source file: 'django.po'
on 'sq'.

Co-authored-by: transifex-integration[bot] <43880903+transifex-integration[bot]@users.noreply.github.com>

Bumps [actions/cache](https://github.com/actions/cache) from 4.2.2 to 4.2.3.
- [Release notes](https://github.com/actions/cache/releases)
- [Changelog](https://github.com/actions/cache/blob/main/RELEASES.md)
- [Commits](actions/cache@v4.2.2...v4.2.3)

---
updated-dependencies:
- dependency-name: actions/cache
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Fabian Braun <fsbraun@gmx.de>

* fix: Use consistent django colors for accent object tools

* chore: Update tests for django CMS 5

* chore: Remove legacy versioning menu

* fix linting issue

* Update test matrix

* Fix test against CMS main branch

* Test against latest postgres (for newer Django versions)

* Reduce test runs

* Update coverage rules

* Move setup config to pyproject.toml

* Add toml option to requirements

* Update README.rst

* Update __init__.py

* Update CHANGELOG.rst

* Update __init__.py

* Update README.rst

* Update README.rst

* fix: Build config

* add action

* Reset action trigger

* run action on PR

* Update version and changelog