Add option to mark bookmarks as shared by default (#1170)

* Add option to mark bookmarks as shared by default

* add migration

bookmarks/migrations/0048_userprofile_default_mark_shared.py

@@ -0,0 +1,18 @@
+# Generated by Django 5.2.3 on 2025-08-22 17:38
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("bookmarks", "0047_populate_url_normalized_field"),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name="userprofile",
+            name="default_mark_shared",
+            field=models.BooleanField(default=False),
+        ),
+    ]