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/roles/meshcore_cli/tasks/main.yml

@@ -0,0 +1,15 @@
+---
+- name: Ensure pipx path is configured
+  shell: pipx ensurepath
+  args:
+    executable: /bin/bash
+  become: false
+  register: pipx_ensurepath
+  changed_when: "'already' not in pipx_ensurepath.stdout"
+
+- name: Install meshcore-cli via pipx
+  shell: pipx install meshcore-cli
+  args:
+    executable: /bin/bash
+    creates: "{{ ansible_env.HOME }}/.local/bin/meshcore-cli"
+  become: false