feat(setting): Enable super admin to set ALL device models as global

sets is_global=true and creates device models in global organization

!12 closes #29

app/settings/migrations/0007_appsettings_device_model_is_global.py

@@ -0,0 +1,18 @@
+# Generated by Django 5.0.6 on 2024-05-27 04:38
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('settings', '0006_appsettings_software_categories_is_global_and_more'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='appsettings',
+            name='device_model_is_global',
+            field=models.BooleanField(default=False, verbose_name='All Device Models are global'),
+        ),
+    ]