feat!: fix templates with the caller's values replace run_device_action (0.3.0)

fix_snmp overwrote snmpd.conf with an application's values (community
"public", "Managed by netOrk", netork@localhost) through a fixed
/tmp/netork_snmpd.conf, and opened ufw for a /24 guessed from ss;
install_lldpd was an action of its own. Neither read an exit status.

The driver implements napalm-device-types 4.13's templates instead:
- configure_snmp_agent(settings): net-snmp installed, snmpd.conf with
  one rocommunity line per allowed source (mktemp, install as root),
  ufw opened for those sources only (pve-firewall stays the
  operator's), snmpd enabled and restarted;
- get_management_peer() from SSH_CONNECTION;
- install_package(name), as the contract says (raises when apt fails),
  so ensure_package comes from the base package.
Every step reads its exit status.

BREAKING CHANGE: run_device_action is removed. Requires
napalm-device-types 4.13.

Part of #24.

pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "napalm-proxmox"
-version = "0.2.0"
+version = "0.3.0"
 description = "NAPALM driver for Proxmox VE (classic Linux networking, SDN, OVS)"
 readme = "README.md"
 license = { text = "Apache-2.0" }
@@ -25,7 +25,7 @@ classifiers = [
 requires-python = ">=3.9"
 dependencies = [
     "napalm>=5.0.0",
-    "napalm_device_types>=4.9.0",
+    "napalm_device_types>=4.13.0",
     "paramiko>=5.0.0",  # CVE-2026-44405; imported directly for SSH fallback (driver.py)
     "proxmoxer>=2.0.0",
     "netaddr>=0.9.0",