Resolve "Add export functionality to course book"

Closes #258 (closed)

CHANGELOG.rst

@@ -16,6 +16,11 @@ If you're upgrading from 3.x, there is now a migration path to use.
 Therefore, please install ``AlekSIS-App-Lesrooster`` which now
 includes parts of the legacy Chronos and the migration path.
 
+Added
+~~~~~
+
+* Configurable PDF export of the coursebook for one or more groups.
+
 `4.0.0.dev8`_ - 2024-11-15
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