Add Themis application with custom widgets, views, and utilities

- Implemented custom form widgets for date, time, and datetime fields with DaisyUI styling.
- Created utility functions for formatting dates, times, and numbers according to user preferences.
- Developed views for profile settings, API key management, and notifications, including health check endpoints.
- Added URL configurations for Themis tests and main application routes.
- Established test cases for custom widgets to ensure proper functionality and integration.
- Defined project metadata and dependencies in pyproject.toml for package management.

mnemosyne/library/management/commands/embed_collection.py

@@ -0,0 +1,43 @@
+"""
+Management command to embed all items in a Collection.
+
+Usage:
+    python manage.py embed_collection <collection_uid>
+"""
+
+import logging
+
+from django.core.management.base import BaseCommand, CommandError
+
+logger = logging.getLogger(__name__)
+
+
+class Command(BaseCommand):
+    help = "Queue embedding tasks for all items in a Collection."
+
+    def add_arguments(self, parser):
+        parser.add_argument(
+            "collection_uid", type=str, help="UID of the Collection to embed"
+        )
+
+    def handle(self, *args, **options):
+        collection_uid = options["collection_uid"]
+
+        try:
+            from library.models import Collection
+
+            col = Collection.nodes.get(uid=collection_uid)
+        except Exception as exc:
+            raise CommandError(f"Collection not found: {collection_uid} ({exc})")
+
+        items = col.items.all()
+        self.stdout.write(f"Collection: {col.name} ({len(items)} items)")
+
+        from library.tasks import embed_collection
+
+        task = embed_collection.delay(collection_uid)
+        self.stdout.write(
+            self.style.SUCCESS(
+                f"Batch task queued: {task.id} ({len(items)} items)"
+            )
+        )