Add the possbility to provide descriptions (#32)

to class, rolling stock, book

ram/bookshelf/migrations/0013_book_description.py

@@ -0,0 +1,19 @@
+# Generated by Django 5.0.2 on 2024-03-02 14:31
+
+import tinymce.models
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("bookshelf", "0012_alter_book_notes"),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name="book",
+            name="description",
+            field=tinymce.models.HTMLField(blank=True),
+        ),
+    ]