fix(erpnext): bootstrap pip in uv venv for ansible install

bench setup production internally runs:
  sudo <uv-venv-python> -m pip install ansible
but uv tool environments don't include pip by default.

Fix: run ensurepip + pip install ansible before bench setup
production to satisfy the dependency.

install/erpnext-install.sh

@@ -82,6 +82,9 @@ $STD systemctl enable --now redis-server
 msg_ok "Configured ERPNext"
 
 msg_info "Setting up Production"
+BENCH_VENV="/home/frappe/.local/share/uv/tools/frappe-bench"
+$STD "${BENCH_VENV}/bin/python" -m ensurepip
+$STD "${BENCH_VENV}/bin/python" -m pip install ansible
 $STD bash -c 'export PATH="/home/frappe/.local/bin:$PATH"; cd /opt/frappe-bench && bench setup production frappe --yes'
 $STD systemctl enable --now supervisor
 msg_ok "Set up Production"