Add a custom manager to filter private and unpublished stuff (#39)

* Implement a customer manager for flatpages

* Implement public manager for private objects

* Add support for unpublished objects in roster and consist

* Add support for unpublished objects in bookshelf

* Update filtering on REST views

* Use uuid in urls.py

* Increment version

ram/consist/migrations/0012_consist_published.py

@@ -0,0 +1,18 @@
+# Generated by Django 5.1.2 on 2024-11-04 12:37
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("consist", "0011_alter_consist_consist_address_alter_consist_era"),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name="consist",
+            name="published",
+            field=models.BooleanField(default=True),
+        ),
+    ]