Hide 9 immature repos until flushed out (#2)

## Summary
- Flip 9 stub/placeholder repos from public to private so they aren't
showcased while empty.
- Repos affected: aws-iam-manager, aws-master, aws-terraform-framework,
batch-powershell-polyglot, compliance-baseline-reference,
deploy-hello-world, deploy-shellshockable, packer-required-version,
talos-cluster.
- Mature repos remain public (ansible-framework, chisel-releases,
proxmox-*, secure-*, github-terraform-*, start-uninstaller, tdahq-sim00,
deploy-whoami).

## Test plan
- [ ] Terraform plan shows visibility change from public -> private on
the 9 repos only
- [ ] No other drift
- [ ] Apply and verify on github.com

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-authored-by: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: NWarila

repos/public/aws-iam-manager.yml

@@ -1,6 +1,6 @@
 aws-iam-manager:
   description: "Terraform-driven AWS IAM management for roles, policies, and secure access patterns."
-  visibility: "public"
+  visibility: "private"
   topics:
     - aws
     - iam

repos/public/aws-master.yml

@@ -1,6 +1,6 @@
 aws-master:
   description: "Terraform landing-zone/control-plane for a 3-account AWS Organization (DEV/TEST/PROD) and shared bootstrap artifacts (remote state + tfvars) consumed by all infrastructure repos."
-  visibility: "public"
+  visibility: "private"
   topics:
     - aws
     - aws-organizations

repos/public/aws-terraform-framework.yml

@@ -1,6 +1,6 @@
 aws-terraform-framework:
   description: "Terraform framework for deploying and managing AWS EC2 and RDS infrastructure with secure, repeatable patterns."
-  visibility: "public"
+  visibility: "private"
   topics:
     - aws
     - terraform

repos/public/batch-powershell-polyglot.yml

@@ -1,6 +1,6 @@
 batch-powershell-polyglot:
   description: "MS Batch + PowerShell polyglot scripts (single-file .bat/.cmd wrappers with embedded PowerShell) for portable Windows automation, elevation handling, and reusable scripting patterns."
-  visibility: "public"
+  visibility: "private"
   topics:
     - windows
     - powershell

repos/public/compliance-baseline-reference.yml

@@ -1,6 +1,6 @@
 compliance-baseline-reference:
   description: "Reference archive of configuration and policy files from hardened systems, mapped to DISA STIG, CIS Benchmarks, PCI DSS, and other compliance frameworks for building secure baselines from scratch."
-  visibility: "public"
+  visibility: "private"
   topics:
     - linux
     - compliance

repos/public/deploy-hello-world.yml

@@ -1,6 +1,6 @@
 deploy-hello-world:
   description: "Minimal deployable service that proves the GitOps admission contract end to end with a stateless hello-world application."
-  visibility: "public"
+  visibility: "private"
   topics:
     - kubernetes
     - gitops

repos/public/deploy-shellshockable.yml

@@ -1,6 +1,6 @@
 deploy-shellshockable:
   description: "Deployable Shellshockable security demonstration service built on custom Ubuntu Chiseled base images for vulnerability awareness and container security validation."
-  visibility: "public"
+  visibility: "private"
   topics:
     - kubernetes
     - gitops

repos/public/packer-required-version.yml

@@ -1,6 +1,6 @@
 packer-required-version:
   description: "Extract Packer required_version from HCL templates and export PACKER_VERSION via GitHub Actions."
-  visibility: "public"
+  visibility: "private"
   topics:
     - packer
     - hashicorp

repos/public/talos-cluster.yml

@@ -1,6 +1,6 @@
 talos-cluster:
   description: "Bare-metal Talos Linux Kubernetes platform with GitOps bootstrap, policy-as-code, and hardware-first operational documentation."
-  visibility: "public"
+  visibility: "private"
   topics:
     - talos
     - talos-linux