Initial monorepo scaffold

Turborepo + pnpm monorepo for k3s homelab cluster on Intel NUCs.

- Apps: Next.js web frontend, Express API (TypeScript, Dockerfiles, k8s manifests)
- Packages: shared UI, ESLint config, TypeScript config, Drizzle DB schemas
- Infra/Ansible: bare-metal provisioning with roles for common, k3s-server, k3s-agent, hardening
- Infra/Kubernetes: ArgoCD GitOps (app-of-apps + ApplicationSets), platform components
  (cert-manager, Traefik, CloudNativePG, Valkey, Longhorn, Sealed Secrets), namespaces
- Observability: kube-prometheus-stack, Loki, Promtail as ArgoCD Applications
- CI/CD: GitHub Actions for PR builds, preview deploys, production deploys
- DX: Taskfile, utility scripts, copier templates, Ubiquiti network docs

infra/kubernetes/argocd/kustomization.yaml

@@ -0,0 +1,22 @@
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+namespace: argocd
+resources:
+  - namespace.yaml
+  - https://raw.githubusercontent.com/argoproj/argo-cd/v2.13.3/manifests/install.yaml
+  - app-of-apps.yaml
+  - appsets/platform.yaml
+  - appsets/apps.yaml
+  - appsets/previews.yaml
+patches:
+  - target:
+      kind: ConfigMap
+      name: argocd-cm
+    patch: |
+      apiVersion: v1
+      kind: ConfigMap
+      metadata:
+        name: argocd-cm
+      data:
+        url: https://argocd.homelab.local
+        application.resourceTrackingMethod: annotation