Propose support for Ironic Standalone Networking

This adds a proposed design to add support for the new
Ironic Networking service which provides the ability to
control Top-of-Rack (TOR) switches without requiring any
other OpenStack services (e.g., Neutron).

Signed-off-by: Allain Legacy <[email protected]>

Author: alegacy

.cspell-config.json

@@ -94,6 +94,7 @@
     "healthcheck",
     "Hellmann",
     "hostname",
+    "htpasswd",
     "HWCC",
     "idrac",
     "initramfs",