created apps.dashboard.urls & offloaded many of the app-specific paths from core.urls here instead

apps/dashboard/urls.py

@@ -0,0 +1,8 @@
+from django.urls import path
+from . import views
+
+urlpatterns = [
+    path('newlist', views.new_list, name='new_list'),
+    path('<int:list_id>/', views.view_list, name='view_list'),
+    path('<int:list_id>/add-item', views.add_item, name='add_item'),
+]