feat(ansible): add OpenWrt dlink AP configuration

Add community.openwrt collection, dlink host to inventory,
openwrt role with system/network/firewall tasks, and two
playbooks: dlink-init.yml for one-time bootstrap from factory
IP, and openwrt.yml for ongoing idempotent configuration.

Network: MGMT untagged + LAN (vlan2) tagged on WAN port trunk
to MikroTik ether3. Firewall zones replace factory WAN/LAN
with mgmt (input ACCEPT) and lan (forward ACCEPT, AP mode).

ansible/requirements.yml

@@ -3,3 +3,5 @@ collections:
     version: ">=3.16.0"
   - name: community.hashi_vault
     version: ">=7.1.0"
+  - name: community.openwrt
+    version: ">=1.0.0"