feat: add spec repository (#5)

stages/repositories/spec.tf

@@ -0,0 +1,31 @@
+module "specification" {
+  source             = "../../modules/github-repo"
+  name               = "spec"
+  description        = "This is the powerd6 specification, and it documents how the project behaves."
+  topics             = ["specification", "documentation"]
+  org_administrators = var.org_administrators
+}
+
+resource "github_repository_environment" "spec_preview" {
+  environment = "preview"
+  repository  = module.specification.name
+  deployment_branch_policy {
+    protected_branches     = true
+    custom_branch_policies = false
+  }
+}
+
+resource "github_repository_environment" "spec_release" {
+  environment = "release"
+  repository  = module.specification.name
+  deployment_branch_policy {
+    protected_branches     = false
+    custom_branch_policies = true
+  }
+}
+
+resource "github_repository_environment_deployment_policy" "spec_release_main" {
+  repository     = module.specification.name
+  environment    = github_repository_environment.infra_live.environment
+  branch_pattern = module.specification.main_branch
+}