feat(k8s): add K8s manifests for all homelab services

traefik, gitea, adguard, nextcloud, errorpages, homepages,
uptime-kuma, kener, checkmk, headscale, dockmon, metube,
downtify, portainer, netronome, userbot

Includes Helm values, deployments, services, ingress routes,
configmaps, secrets (placeholders), postgres statefulsets,
kustomize overlays, and Traefik dynamic configuration.

metube/k8s/config.yaml

@@ -0,0 +1,10 @@
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: metube-config
+  namespace: metube
+data:
+  DOWNLOAD_MODE: "limited"
+  MAX_CONCURRENT_DOWNLOADS: "3"
+  DELETE_FILE_ON_TRASHCAN: "true"
+  DEFAULT_OPTION_PLAYLIST_STRICT_MODE: "true"