feat: fix routines as templates with the caller's values; deprecate run_device_action (4.13.0)

run_device_action was a string dispatch drivers filled with an
application's remediations, values hard-coded inside (community
"public", the caller's address, a /24 firewall rule).

napalm_device_types.fixes declares them as templates instead. A
template runs declared steps in order and stops at the first failure
(run_fix_steps); the driver implements the steps, or overrides the
whole method where its device takes the change in one call; every
value comes from the caller.

- SnmpAgentMixin.configure_snmp_agent(settings): install, configure,
  firewall, start. The caller verifies with its own SNMP client.
  get_management_peer() (optional) says the address the device sees the
  management connection come from, for choosing allowed_sources.
- EnsurePackageMixin.ensure_package(name): install only what is missing.
- PackageProxyMixin.configure_package_proxy(url): declared.
- ContainerEngineMixin.grant_container_engine_access(user): declared.

None is mixed into a role base, so a capability check stays truthful.

Closes #33

pyproject.toml

@@ -4,7 +4,7 @@ build-backend = "setuptools.build_meta"
 
 [project]
 name = "napalm-device-types"
-version = "4.12.0"
+version = "4.13.0"
 description = "Abstract device-type base classes for NAPALM drivers"
 readme = "README.md"
 requires-python = ">=3.10"