Add intended_date_kwarg field to Schedule (#62)

Co-authored-by: Marc Sabatier <marc.sabatier@eco-adapt.com>

django_q/migrations/0016_schedule_intended_date_kwarg.py

@@ -0,0 +1,25 @@
+# Generated by Django 4.1.2 on 2023-01-15 22:34
+
+from django.db import migrations, models
+import django_q.models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("django_q", "0015_alter_schedule_schedule_type"),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name="schedule",
+            name="intended_date_kwarg",
+            field=models.CharField(
+                blank=True,
+                help_text="Name of kwarg to pass intended schedule date",
+                max_length=100,
+                null=True,
+                validators=[django_q.models.validate_kwarg],
+            ),
+        ),
+    ]