Check-in: Show more information (#3576)

* Check-in: Show more information

* Add change notes

* Rebase migration

* Add "expand" option to checkinrpc

* REmove accidental file

* Docs fixes

* REbase migration

* Rebase migration

* Fix typo

* REbase migration

* Make web-checkin look more like new android checkin

src/pretix/base/migrations/0253_checkin_info.py

@@ -0,0 +1,32 @@
+# Generated by Django 4.2.4 on 2023-09-06 09:44
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+    dependencies = [
+        ("pretixbase", "0252_logentry_organizer"),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name="item",
+            name="checkin_text",
+            field=models.TextField(null=True),
+        ),
+        migrations.AddField(
+            model_name="itemvariation",
+            name="checkin_text",
+            field=models.TextField(null=True),
+        ),
+        migrations.AddField(
+            model_name="order",
+            name="checkin_text",
+            field=models.TextField(null=True),
+        ),
+        migrations.AddField(
+            model_name="question",
+            name="show_during_checkin",
+            field=models.BooleanField(default=False),
+        ),
+    ]