docs: multi project (#80)

* docs: multi project

* chore: apply suggestions from code review

* chore: apply suggestions from code review

Co-authored-by: lacework-aaronscheiber <[email protected]>

---------

Co-authored-by: Salim Afiune <[email protected]>
Co-authored-by: lacework-aaronscheiber <[email protected]>

Author: 3 people

examples/project-level-config-multi/README.md

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+# Integrate Multiple Google Cloud Projects with Lacework for Configuration Assessment
+The following provides an example of integrating multiple Google Cloud projects with Lacework for cloud resource configuration assessment.
+
+The fields required for this example are:
+
+| Name       | Description                                                                                 | Type     |
+|------------|---------------------------------------------------------------------------------------------|----------|
+| `projects` | The ID of each project, which will be used to deploy required resources for the integration | `map` |
+
+
+```hcl
+provider "google" {
+  project = keys(var.projects)[0]
+}
+
+provider "lacework" {}
+
+variable "projects" {
+  description = "Map of project configuration with Lacework."
+  type        = map
+  default     = {
+    project-id-1 = "first project",
+    project-id-2 = "second project"
+  }
+}
+
+module "gcp_project_config" {
+  source  = "lacework/config/gcp"
+  version = "~> 2.0"
+
+  for_each   = var.projects
+  project_id = each.key
+}
+```
+
+Run Terraform:
+```
+$ terraform init
+$ GOOGLE_CREDENTIALS=account.json terraform apply
+```
+
+For detailed information on integrating Lacework with Google Cloud see [GCP Compliance and Audit Trail Integration - Configure Multiple Porjects with Terraform](https://docs.lacework.com/onboarding/gcp-compliance-and-audit-log-integration-terraform-using-google-cloud-shell#configure-multiple-projects-with-terraform)

examples/project-level-config-multi/main.tf

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+provider "google" {
+  project = keys(var.projects)[0]
+}
+
+provider "lacework" {}
+
+variable "projects" {
+  description = "Map of project configuration with Lacework."
+  type        = map
+  default     = {
+    project-id-1 = "first project",
+    project-id-2 = "second project"
+  }
+}
+
+module "gcp_project_config" {
+  source = "../../"
+
+  for_each   = var.projects
+  project_id = each.key
+}

examples/project-level-config-multi/versions.tf

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+# required for Terraform 13
+terraform {
+  required_providers {
+    google = "~> 4.36"
+    lacework = {
+      source = "lacework/lacework"
+    }
+  }
+
+
+}