feat: add homelab config skills (VLAN segmentation, Pi-hole DNS, WireGuard VPN) (#1838)

* feat: add homelab config skills (VLAN, Pi-hole, WireGuard)

Adds three homelab configuration skills, extracted from the stale PR #1413
with the same safety treatment applied to the previously accepted batch:

- homelab-vlan-segmentation: IoT/guest/trusted/server VLAN design for UniFi,
  pfSense/OPNsense, and MikroTik. All firewall rules add isolation, not remove
  protections. Added change-window guidance and AP trunk port clarification.

- homelab-pihole-dns: Pi-hole install, blocklists, DNS-over-HTTPS, local DNS
  records, troubleshooting. Docker is now the lead install method; bare-metal
  uses inspect-first pattern before running the installer script.

- homelab-wireguard-vpn: WireGuard server, peer config, split tunnel, DDNS.
  Replaced broad iptables FORWARD ACCEPT with scoped directional rules
  (wg0→eth0 forward + established return only). Credentials moved to env
  files with explicit notes against inline secrets and version control.

Continues the contribution from PR #1413; the eight skills/agents from
that PR are already in main via #1729 and #1731.

* docs: harden homelab skill pack

---------

Co-authored-by: Affaan Mustafa <affaan@dcube.ai>

.claude-plugin/marketplace.json

@@ -11,7 +11,7 @@
     {
       "name": "ecc",
       "source": "./",
-      "description": "The most comprehensive Claude Code plugin — 60 agents, 225 skills, 75 legacy command shims, selective install profiles, and production-ready hooks for TDD, security scanning, code review, and continuous learning",
+      "description": "The most comprehensive Claude Code plugin — 60 agents, 228 skills, 75 legacy command shims, selective install profiles, and production-ready hooks for TDD, security scanning, code review, and continuous learning",
       "version": "2.0.0-rc.1",
       "author": {
         "name": "Affaan Mustafa",

.claude-plugin/plugin.json

@@ -1,7 +1,7 @@
 {
   "name": "ecc",
   "version": "2.0.0-rc.1",
-  "description": "Battle-tested Claude Code plugin for engineering teams — 60 agents, 225 skills, 75 legacy command shims, production-ready hooks, and selective install workflows evolved through continuous real-world use",
+  "description": "Battle-tested Claude Code plugin for engineering teams — 60 agents, 228 skills, 75 legacy command shims, production-ready hooks, and selective install workflows evolved through continuous real-world use",
   "author": {
     "name": "Affaan Mustafa",
     "url": "https://x.com/affaanmustafa"