- Added PricingPlan Model

- Implement a complete cycle for buying a Matrix Chat Host
- Refactor the Payement cycle and stripe related methods

uncloud_pay/migrations/0014_auto_20210703_1747.py

@@ -0,0 +1,23 @@
+# Generated by Django 3.2.4 on 2021-07-03 17:47
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('uncloud_pay', '0013_alter_billingaddress_owner'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='billingaddress',
+            name='stripe_tax_id',
+            field=models.CharField(blank=True, default='', max_length=100),
+        ),
+        migrations.AddField(
+            model_name='billingaddress',
+            name='vat_number_validated_on',
+            field=models.DateTimeField(blank=True, null=True),
+        ),
+    ]