feat(research): add research study management functionality

- Implemented models for ResearchStudy, ResearchStudyArm, and ResearchParticipant.
- Created views for listing, creating, updating, and exporting research studies.
- Added bulk participant generation feature with CSV and JSON support.
- Developed templates for study management, participant entry, and bulk generation.
- Introduced URL routing for research study operations.
- Added utility functions for randomisation and participant assignment.
- Implemented participant intake process with demographic data collection.
- Ensured proper handling of participant CIDs and assignment methods.

atlas/urls.py

@@ -99,6 +99,11 @@ urlpatterns = [
         views.collection_sync_prerequisite_users,
         name="collection_sync_prerequisite_users",
     ),
+    path(
+        "collection/<int:pk>/apply_question_template",
+        views.collection_apply_question_template,
+        name="collection_apply_question_template",
+    ),
     path("collection/<int:pk>/authors", views.CaseCollectionAuthorUpdate.as_view(), name="collection_authors"),
     path(
         "collection/<int:pk>/toggle_results_published",