Add locations to program times (Z#23221129)

Add location for program time slots and extend .ical and PDF placeholder

src/pretix/base/migrations/0299_itemprogramtime_location.py

@@ -0,0 +1,19 @@
+# Generated by Django 4.2.27 on 2026-01-21 12:06
+
+import i18nfield.fields
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("pretixbase", "0298_pluggable_permissions"),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name="itemprogramtime",
+            name="location",
+            field=i18nfield.fields.I18nTextField(max_length=200, null=True),
+        )
+    ]