Add Ansible playbooks for MeshCore monitoring node deployment

Roles: base (apt, tailscale, motd), meshcore_cli (pipx), meshcore_capture
(agessaman/meshcore-packet-capture + .env.local template), scripts (voltage, bandwidth).

Host vars contain per-device serial ports; group vars hold shared MQTT broker config.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

ansible/site.yml

@@ -0,0 +1,22 @@
+---
+- name: Deploy MeshCore monitoring nodes
+  hosts: meshcore
+  vars_prompt:
+    - name: tailscale_auth_key
+      prompt: "Tailscale auth key (leave blank to skip)"
+      private: true
+      default: ""
+
+  pre_tasks:
+    - name: Update apt cache and upgrade packages
+      apt:
+        update_cache: true
+        upgrade: dist
+        autoremove: true
+      become: true
+
+  roles:
+    - base
+    - meshcore_cli
+    - meshcore_capture
+    - scripts