✨ Add pin deletion endpoint

app/routes/pins.py

@@ -70,4 +70,19 @@ async def add_pin(pin: PinDTO, current_user: User = Depends(get_current_user)):
 )
 async def list_pins(current_user: User = Depends(get_current_user)):
     pins = serializers.pins_serialize(pins_collection.find().to_list(), current_user.uid)
-    return pins
+    return pins
+
+@pins_router.delete(
+    path="/{id}",
+    responses={401: {"model": HTTPError}, 404: {"model": HTTPError}, 422: {"model": HTTPError}}
+)
+async def delete_pin(id: str, current_user: User = Depends(get_current_user)):
+    try:
+        result = pins_collection.delete_one({"_id": ObjectId(id)})
+    except bson.errors.InvalidId:
+        objectid_misformatted()
+
+    if result.deleted_count == 0:
+        raise HTTPException(status_code=404, detail="Pin not found")
+    
+    return {"message": "Pin deleted"}