Initial commit: GitOps Starter Pack

A teaching-first, single-cluster GitOps setup: Talos Linux + Argo CD with
an app-of-apps layout, MetalLB pre-installed for real LoadBalancer IPs on
bare metal, a demo app, and a progressive docs/ walkthrough with a
CLAUDE.md tutor persona and guided bootstrap checklist.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

apps/metallb/values.yaml

@@ -0,0 +1,9 @@
+# Values for the upstream MetalLB chart, nested under `metallb:` (the
+# dependency's name in Chart.yaml — Helm nests subchart values under the
+# subchart's name automatically). Empty by default: MetalLB's own chart
+# defaults are sane for a small single-cluster setup. Add overrides here if
+# you ever need them, e.g.:
+#
+# metallb:
+#   speaker:
+#     tolerations: []