feat!: report hosts and licenses as facts, not warnings (0.2.0)

get_device_warnings is gone; netOrk names the warnings from facts
(netOrk #1111). get_hypervisor_hosts() reports each host's connection
state, maintenance mode, configuration issues and managing vCenter;
get_licenses() the assigned licenses with the edition key as edition,
never the key itself.

The reach stays: the ESXi driver reports connected as None (a
disconnected host could not have answered), and managed_by only for a
host it reached directly. parse/warnings.py is replaced by
parse/hosts.py and parse/licenses.py.

napalm_vmware/parse/hosts.py

@@ -0,0 +1,39 @@
+"""The hosts a driver sees, as facts (``HypervisorDriver.get_hypervisor_hosts``).
+
+Whether a host in maintenance mode or one managed by a vCenter is a problem is
+decided by the caller, never here.
+"""
+
+from __future__ import annotations
+
+from typing import Any
+
+from napalm_device_types.models import HypervisorHostDict
+
+_CONNECTED = "connected"
+_UNMANAGED = {None, "", "0.0.0.0"}
+
+
+def _host(host: dict[str, Any], standalone: bool) -> HypervisorHostDict:
+    manager = host.get("summary.managementServerIp")
+    return {
+        "name": host.get("name", host.get("_moref", "")),
+        # A disconnected host could not have answered the ESXi driver.
+        "connected": None
+        if standalone
+        else host.get("runtime.connectionState", _CONNECTED) == _CONNECTED,
+        "maintenance": bool(host.get("runtime.inMaintenanceMode")),
+        "config_issues": [
+            i["fullFormattedMessage"]
+            for i in host.get("configIssue") or []
+            if i.get("fullFormattedMessage")
+        ],
+        # Under a vCenter every host names that vCenter; only a host the ESXi
+        # driver reached directly can be managed by someone else.
+        "managed_by": manager if standalone and manager not in _UNMANAGED else None,
+    }
+
+
+def hypervisor_hosts(hosts: list[dict[str, Any]], *, standalone: bool) -> list[HypervisorHostDict]:
+    """``standalone`` is True for the ESXi driver, False for vCenter."""
+    return [_host(host, standalone) for host in hosts]