feat: Implement routines feature with CRUD operations and child assignment

- Add backend routines management with add, get, update, delete, and list functionalities.
- Create models for Routine, RoutineItem, RoutineSchedule, and RoutineExtension.
- Develop event types for routine confirmation and modification.
- Implement frontend components for routine assignment, confirmation dialog, and routine management views.
- Add unit tests for routine API and integration tests for routine CRUD flow.
- Create end-to-end test plan for routines feature covering parent and child interactions.

backend/models/routine.py

@@ -0,0 +1,32 @@
+from dataclasses import dataclass
+from models.base import BaseModel
+
+
+@dataclass
+class Routine(BaseModel):
+    name: str
+    points: int
+    image_id: str | None = None
+    user_id: str | None = None
+
+    @classmethod
+    def from_dict(cls, d: dict):
+        return cls(
+            name=d.get('name'),
+            points=d.get('points', 0),
+            image_id=d.get('image_id'),
+            user_id=d.get('user_id'),
+            id=d.get('id'),
+            created_at=d.get('created_at'),
+            updated_at=d.get('updated_at')
+        )
+
+    def to_dict(self):
+        base = super().to_dict()
+        base.update({
+            'name': self.name,
+            'points': self.points,
+            'image_id': self.image_id,
+            'user_id': self.user_id
+        })
+        return base