* feat: Add Library Collections REST endpoints
* test: Add tests for Collections REST APIs
* chore: Add missing __init__ files
* docs: Add warning about unstable REST APIs
* feat: emit CONTENT_OBJECT_ASSOCIATIONS_CHANGED
whenever a content object's tags or collections have changed,
and handle that event in content/search.
The deprecated CONTENT_OBJECT_TAGS_CHANGED event is still emitted when
tags change; to be removed after Sumac.
* docs: replaces CONTENT_OBJECT_TAGS_CHANGED with CONTENT_OBJECT_ASSOCIATIONS_CHANGED
* chore: updates openedx-events==9.14.0
* chore: updates openedx-learning==0.11.4
Co-authored-by: Yusuf Musleh <yusuf@opencraft.com>
Co-authored-by: Chris Chávez <xnpiochv@gmail.com>
Co-authored-by: Rômulo Penido <romulo@thinkdash.dev>
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