Openedx-filters

--------------------

Added
~~~~~

* Unenrollment filter definition.
* Certificate creation/rendering filters.
* Dashboard render filter definition.
* Course home/about render filters.
* Cohort change filter.

--------------------

Changed
~~~~~~~

* Add fail_silently when importing filter steps.

--------------------

Changed
~~~~~~~

* Fix dictionary mishandling in OpenEdxPublicFilter tooling.

--------------------

Changed
~~~~~~~

* Use `run_filter` instead of `run` in OpenEdxPublicFilter tooling.

--------------------

Added
~~~~~

* Filter definitions for registration and login.
* Sensitive data mixin for filters.

Changed
~~~~~~~

* Pipeline runner from `run` to `run_filter`.
* Moved filters definitions to filters file inside their domain.

--------------------

Added
~~~~~

* ADRs for naming, payload and debugging tools.
* OpenEdxPublicFilter class with the necessary tooling for filters execution
* PreEnrollmentFilter class definition

Changed
~~~~~~~

* Update doc-max-length following community recommendations.