Add EKS Istio Dashboards (#194)

* Update readme

* checking in new readme example

* new istio readme

* Updated mkdocs.yml

* checking in readme files

* checking in all changes

* Test

* Test

* Test

* Testing

* Testing

* test

* Update main.tf

* Update outputs.tf

* Adding Istio dashboards

* Updating URL's

* Removing dashboards

* Updates from pre-commit

* Update istio.md

* Removing empty file

* Update istio.md

* Update istio.md

* Update istio.md

* Update istio.md

* Update istio.md

* Update istio.md

* Update istio.md

* Update istio.md

* Update istio.md

* Update istio.md

* Update istio.md

* Update istio.md

* Update istio.md

* Update istio.md

* Update istio.md

* Update istio.md

* Update README.md

* Update istio.md

* Update istio.md

* Update istio.md

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* Update README.md

* Update README.md

* Istio Documentation Updates

Added istioctl prereq, updated dashboards image

* Updated setup and cleanup of Istio Bookinfo

Updated Istio Bookinfo sample app instructions, included clean up of Bookinfo resources

* Updating image and removing advanced configuration

-Switching image to Github generated link
-Removing advanced configuration section

---------

Co-authored-by: Prithvi Reddy <ypreddy@amazon.com>
Co-authored-by: Prithvi Reddy <47993564+preddy727@users.noreply.github.com>

examples/eks-istio/variables.tf

@@ -0,0 +1,33 @@
+variable "eks_cluster_id" {
+  description = "Name of the EKS cluster"
+  type        = string
+  default     = "eks-cluster-with-vpc"
+}
+
+variable "aws_region" {
+  description = "AWS Region"
+  type        = string
+}
+
+variable "managed_prometheus_workspace_id" {
+  description = "Amazon Managed Service for Prometheus Workspace ID"
+  type        = string
+  default     = ""
+}
+
+variable "managed_grafana_workspace_id" {
+  description = "Amazon Managed Grafana Workspace ID"
+  type        = string
+}
+
+variable "grafana_api_key" {
+  description = "API key for authorizing the Grafana provider to make changes to Amazon Managed Grafana"
+  type        = string
+  sensitive   = true
+}
+
+variable "enable_dashboards" {
+  description = "Enables or disables curated dashboards. Dashboards are managed by the Grafana Operator"
+  type        = bool
+  default     = true
+}