feat: Add asset inventory and public endpoint dashboards (#1257)

* feat: Add asset inventory and public endpoint dashboards

* Update policies/README.md

Co-authored-by: Herman Schaaf <hermanschaaf@gmail.com>

dashboards/README.md

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+# AWS Dashboards
+
+This directory contains pre-built dashboards. Currently those are available only for Grafana, but you can create them in any other BI platform:
+
+Checkout those tutorials:
+* [Building Open Source Cloud Asset Inventory with CloudQuery and Grafana](https://www.cloudquery.io/blog/open-source-cloud-asset-inventory-with-cloudquery-and-grafana)
+* [Building Open Source Cloud Asset Inventory with CloudQuery and Apache Superset](https://www.cloudquery.io/blog/cloud-asset-inventory-cloudquery-apache-superset)
+* [Building Open Source Cloud Asset Inventory with CloudQuery and AWS QuickSight](https://www.cloudquery.io/blog/cloud-asset-inventory-cloudquery-aws-quicksight)
+* [Building Open Source Cloud Asset Inventory with MetaBase](https://www.cloudquery.io/blog/cloud-asset-inventory-cloudquery-metabase)
+
+## What's inside?
+
+### AWS Asset Inventory
+
+<img alt="AWS Asset Inventory" src="../dashboards/grafana/aws_asset_inventory.png" width=50% height=50%>
+
+#### Installation
+
+1. Execute [this query](https://github.com/cloudquery/cq-provider-aws/blob/main/views/resources.sql) to add the `aws_resources` view.
+2. Add the CloudQuery postgres database as a data source to Grafana (`Configuration -> Data Sources -> Add Data Source`)
+3. Import [../dashboards/grafana/aws_asset_inventory.json](../dashboards/grafana/aws_asset_inventory.json) into Grafana (`Import -> Upload JSON File`).
+
+### AWS EC2 Public/Private Instances
+
+<img alt="AWS EC2 Public/Private Instances Grafana Dashboard" src="../dashboards/grafana/aws_ec2_public_private.png" width=50% height=50%>
+
+#### Installation
+
+1. Add the CloudQuery postgres database as a data source to Grafana (`Configuration -> Data Sources -> Add Data Source`)
+2. Import [../dashboards/grafana/aws_ec2_public_private.json](../dashboards/grafana/aws_ec2_public_private.json) into Grafana (`Import -> Upload JSON File`).
+
+### AWS Compliance and CSPM (Cloud Security Posture Management) Dashboard
+
+<img alt="AWS Compliance and CSPM Dashboard" src="../dashboards/grafana/compliance.png" width=50% height=50%>
+
+#### Installation
+
+1. Execute one more of the AWS [policies](../policies/).
+2. Add the CloudQuery postgres database as a data source to Grafana (`Configuration -> Data Sources -> Add Data Source`)
+3. Import [../dashboards/grafana/compliance.png](../dashboards/grafana/compliance.png) into Grafana (`Import -> Upload JSON File`).