Add MAC address filtering (whitelist/blacklist)

[HiddenKeyDev]

Description

Add ability to whitelist or blacklist MAC addresses for hotspot access control.

Desired behavior

\\�ash
nm-hotspot whitelist add AA:BB:CC:DD:EE:FF
nm-hotspot whitelist remove AA:BB:CC:DD:EE:FF
nm-hotspot whitelist list
nm-hotspot blacklist add 11:22:33:44:55:66
\\

Implementation hints

• Store MAC lists in config directory
• Configure dnsmasq or iptables for filtering
• May need root permissions

Difficulty

Hard