added admin and api views for listing all plugins, and refactored urls import

netbox/extras/plugins/urls.py

@@ -0,0 +1,53 @@
+import importlib
+
+from django.apps import apps
+from django.conf import settings
+from django.conf.urls import include
+from django.core.exceptions import ImproperlyConfigured
+from django.urls import path
+from django.utils.module_loading import import_string
+
+from . import views
+
+# Plugins
+plugin_patterns = []
+plugin_api_patterns = []
+
+for plugin in settings.PLUGINS:
+    app = apps.get_app_config(plugin)
+
+    url_slug = getattr(app, 'url_slug') or app.label
+
+    # Check if the plugin specifies any URLs
+    try:
+        urlpatterns = import_string(f"{plugin}.urls.urlpatterns")
+    except ImportError:
+        # No urls defined
+        urlpatterns = None
+    if urlpatterns:
+        plugin_patterns.append(
+            path(f"{url_slug}/", include((urlpatterns, app.label)))
+        )
+
+    # Check if the plugin specifies any API URLs
+    try:
+        urlpatterns = import_string(f"{plugin}.api.urls.urlpatterns")
+        app_name = import_string(f"{plugin}.api.urls.app_name")
+    except ImportError:
+        # No urls defined
+        urlpatterns = None
+    if urlpatterns:
+        plugin_api_patterns.append(
+            path(f"{url_slug}/", include((urlpatterns, app_name)))
+        )
+
+# Plugin list admin view
+admin_plugin_patterns = [
+    path('', views.installed_plugins_admin_view, name='plugins_list')
+]
+
+# Plugin list API view
+plugin_api_patterns += [
+    path('', views.PluginsAPIRootView.as_view(), name='api-root'),
+    path('installed-plugins/', views.InstalledPluginsAPIView.as_view(), name='plugins-list')
+]