Pykechain

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* :star: Added the method to create workflow in a certain project. `Client.create_workflow(scope=...)` or `Scope.create_workflow()`.
* :+1: dependent versions for development: coverage (6.4)

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* :+1: Ensuring that the order attribute is removed from sidebar items in sync with the deprecation of the order in backend.

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* :+1: Fixed a small decoding issue which was causing prefilters to be double encoded when copying/moving a part. (1148)
* :+1: dependent versions for development: pre-commit (2.18.1), jsonschema (4.5.1)

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Small patch release with a fixed MANIFEST file.

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This is version 4 of pykechain in sync with the "Forms Release" of KE-chain. We added a number
of features to this release that is in full sync with the general availability of Forms in KE-chain.
The most dominant features are `Form`, `Workflow` with their `Transition`'s and `Status`-es and a
greatly improved `Context` featureset.

* We added the feature equivalence in pykechain for KE-chain Forms and Workflow.
* :star: Added the `Forms`, `Workflow`, `Transition`, and `Status` classes. (1100)
* :star: Added multiple `Forms` methods such as `link_contexts`, `unlink_contexts`, `clone_cross_scope`, `apply_transition`, `set_status_assignees`. (1114)
* :star: Added additional `Form` methods such as `has_part` and `compatible_within_scope`. (1108)
* :star: Extended the `DashboardWidget` with the form numbers and charts (1123)
* :star: Added the `FormReferenceProperties`. (1098)
* :star: Added the `ContextReferenceProperties`. (1099)
* :star: Added the concept of a `StatusReferencesProperty`.
* :star: Added 'Forms', 'Form models', 'Contexts' and 'Workflows' sidebar buttons in the `SideBarManager' and added ability to specify 'minimum_access_level' and 'alignment' per 'SideBarButton'. (1103)
* :star: Added the concept of a sidebar card to the sidebar.
* :star: Added the Form Classification on the parts world.
* :star: Added the ability to create a user from the frontend.
* :star: Added the ability to request a change password link from the frontend.
* :+1: Removed the `target_scope` parameter when cloning inside the same scope

Backward incompatible changes
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* :+1: We discontinued support for python version 3.6.

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* :+1: We increased the timeout for downloading PDF's to 180 seconds per default. We futhermore add the ability to set a custom timeout on the `Activity.download_as_pdf()` method.