Add different solutions to AWS exercises

Not only console solutions, but also Terraform and Pulumi.

In addition, this change fixes issues #279 and #280

topics/aws/exercises/new_vpc/pulumi/__main__.py

@@ -0,0 +1,10 @@
+import pulumi
+import pulumi_awsx as awsx
+
+vpc = awsx.ec2.Vpc("exercise-vpc", cidr_block="10.0.0.0/16")
+
+pulumi.export("vpc_id", vpc.vpc_id)
+pulumi.export("publicSubnetIds", vpc.public_subnet_ids)
+pulumi.export("privateSubnetIds", vpc.private_subnet_ids)
+
+# Run 'pulumi up' to create it