Create grafana-dashboards module

This module will allow that we create some basic dashboards. We're
adding the option to create the istio dashboard for now.

aws/grafana-dashboards/README.md

@@ -0,0 +1,49 @@
+# AWS Managed Grafana Dashboards
+
+Adds the option to create some basic dashboards.
+
+Example:
+
+```terraform
+module "grafana_dashboards" {
+  source = "github.com/thoughtbot/flightdeck//aws/grafana-datashboards?ref=VERSION"
+
+  create_istio_dashboard = true
+}
+```
+
+<!-- BEGIN_TF_DOCS -->
+## Requirements
+
+| Name | Version |
+|------|---------|
+| <a name="requirement_terraform"></a> [terraform](#requirement\_terraform) | >= 0.14.8 |
+| <a name="requirement_aws"></a> [aws](#requirement\_aws) | ~> 4.0 |
+| <a name="requirement_grafana"></a> [grafana](#requirement\_grafana) | ~> 1.13 |
+
+## Providers
+
+| Name | Version |
+|------|---------|
+| <a name="provider_grafana"></a> [grafana](#provider\_grafana) | ~> 1.13 |
+
+## Modules
+
+No modules.
+
+## Resources
+
+| Name | Type |
+|------|------|
+| [grafana_dashboard.istio](https://registry.terraform.io/providers/grafana/grafana/latest/docs/resources/dashboard) | resource |
+
+## Inputs
+
+| Name | Description | Type | Default | Required |
+|------|-------------|------|---------|:--------:|
+| <a name="input_create_istio_dashboard"></a> [create\_istio\_dashboard](#input\_create\_istio\_dashboard) | Create Istio dashboard | `bool` | `false` | no |
+
+## Outputs
+
+No outputs.
+<!-- END_TF_DOCS -->