feat: env INSTALL_LONGHORN

Add Ansible playbooks for Longhorn, MetalLB, and Traefik installation

conditional on presence of INSTALL_LONGHORN=true

vagrant/dev/ubuntu/ansible/install_metallb.yaml

@@ -0,0 +1,16 @@
+---
+- name: Install metallb using infctl
+  hosts: localhost
+  become: true
+  become_user: vagrant
+  serial: 1 # Ensure tasks are executed one host at a time
+  vars_files:
+    - vars.yaml
+
+  tasks:
+
+    - name: run ======== infctl metallb pipeline
+      ansible.builtin.command: >
+        bash -c 'cd /home/vagrant && LOG_FILE=/tmp/metallb_log.txt LOG_FORMAT=basic infctl -f ./pipelines/vagrant-metallb.json'
+      register: metallb_result
+      ignore_errors: false