add kontor-blacksheep and kontor-piccolo as blueprints for new app

kontor-blacksheep/sql_app/tables.py

@@ -0,0 +1,12 @@
+from piccolo.colmns import Integer, Varchar
+from piccolo.table import Table
+
+
+class Expense(Table):
+    amount = Integer()
+    description = Varchar()
+
+
+class Item(Table):
+    id = Varchar(primary_key=True, default=uuid.uuid4())
+    description = Text()