Add missing management command

aleksis/core/management/commands/write_webpack_entrypoints.py

+import json
+import os
+
+from django.conf import settings
+from django.core.management.base import BaseCommand, CommandError
+
+from ...util.frontend_helpers import get_apps_with_assets
+
+
+class Command(BaseCommand):
+    help = "Write out webpack entrypoints for all apps"
+
+    def handle(self, *args, **options):
+        assets = {
+            app: {"dependOn": "core", "import": os.path.join(path, "index")}
+            for app, path in get_apps_with_assets().items()
+        }
+        assets["core"] = os.path.join(settings.BASE_DIR, "aleksis", "core", "assets", "index")
+
+        with open(os.path.join(settings.BASE_DIR, "webpack-entrypoints.json"), "w") as out:
+            json.dump(assets, out)