made settings page for banner dynamic from the settings json

backend/api/migrations/0025_banner_schema.py

@@ -0,0 +1,18 @@
+# Generated by Django 6.0.2 on 2026-02-18 13:29
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('api', '0024_seed_banners'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='banner',
+            name='schema',
+            field=models.JSONField(blank=True, default=list),
+        ),
+    ]