update: Added Longhorn installation process and updated memory allocation for VMs

update: Added 'git' and 'vagrant' to required tools in pre-flight checks

fix: configured k3s install to use internal nic for flanel network

fix: corrected JSON formatting for config json

update: reduce VM memory allocation to 2GB, add Longhorn installation scripts and prerequisites, and implement checks for existing pods

vagrant/dev/ubuntu/scripts/wait_for_longhorn.sh

@@ -0,0 +1,17 @@
+#!/usr/bin/env bash
+
+echo 
+echo "wait for longhorn installation"
+echo 
+
+ssh-add  ~/.ssh/vm*_key 
+source /home/vagrant/ansible/venv/bin/activate
+while true; do
+  not_ready=$(kubectl -n longhorn-system get pods --no-headers 2>/dev/null | grep -vE 'Running|Completed' | wc -l)
+  total=$(kubectl -n longhorn-system get pods --no-headers 2>/dev/null | wc -l)
+  if [[ $total -gt 0 && $not_ready -eq 0 ]]; then
+    echo "All Longhorn pods are ready."
+    break
+  fi
+  sleep 10
+done