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/roles/openwrt/tasks/packages.yml

@@ -0,0 +1,7 @@
+---
+- name: Install packages
+  community.openwrt.opkg:
+    name: "{{ item }}"
+    state: present
+    update_cache: true
+  loop: "{{ openwrt_packages }}"