Addon: add validate_allowed_ips() with regex-based comma-separated
format checking (rejects leading/trailing/double commas) and per-entry
ipaddress.ip_network() validation. ConfigureAllowedIPsCommand now shows
a warning dialog on invalid input and only saves valid entries.
MCP server: add --host argument validation using the validators library
(IPv4, IPv6, hostname). Add validators>=0.34.0 as a dependency.
README: document the remote connections feature (enabling in FreeCAD,
configuring allowed IPs, and the --host flag).
neka-nat