Djangocms-alias

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* feat: Add AliasContent admin changelist UnPublished filter
* fix: Add correct icons for Alias Manager actions
* build: Added ``long_description_content_type`` for setuptools.
* ci: Changed test workflow so that the coverage reporting happens after all unittests run
* ci: Updated deprecated isort v4 CLI flags for the v5 double-dashed arguments
* fix: Added parler to the installation instructions as an installed app

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* fix: Re-order AliasContent changelist filters as per the spec

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* feat: Add AliasContent admin changelist Site filter

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* feat: Add site dropdown to create alias wizard and change alias admin

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* feat: Changed Site dropdown url for Aliases to point to the admin changelist
* feat: Refactor alias topdown and versioning action menus

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* feat: Remove Add cta and hide delete dropdown actions from AliasContent admin ChangeList
* feat: Site field added to plugin