commenced DRF efforts w. package installation, creation of apps.api, w. UTs & ITs to ensure core efficacy; core.settings & .urls changed to accomodate

src/apps/api/urls.py

@@ -0,0 +1,11 @@
+from django.urls import path
+
+from . import views
+
+
+urlpatterns = [
+    path('', views.ListsAPI.as_view(), name='api_lists'),
+    path('<int:list_id>/', views.ListDetailAPI.as_view(), name='api_list_detail'),
+    path('<int:list_id>/items/', views.ListItemsAPI.as_view(), name='api_list_items'),
+]
+