chore: Added a README for the simple router example (#23)

Author: betsy-lichtenberg

examples/simple/README.md

@@ -0,0 +1,22 @@
+#  Simple Cloud Router
+
+This example configures a single simple Cloud Router inside of a project.
+
+<!-- BEGINNING OF PRE-COMMIT-TERRAFORM DOCS HOOK -->
+## Inputs
+
+| Name | Description | Type | Default | Required |
+|------|-------------|------|---------|:--------:|
+| network | A reference to the network to which this router belongs | `string` | n/a | yes |
+| project | The GCP project ID | `string` | n/a | yes |
+
+## Outputs
+
+| Name | Description |
+|------|-------------|
+| router\_name | The name of the created router |
+| router\_region | The region of the created router |
+
+<!-- END OF PRE-COMMIT-TERRAFORM DOCS HOOK -->
+
+