Add support for systemctl, python3, ssh, adb, pgrep, pactl, xrandr, pkill

Missed commands from rtk discover

Running rtk 0.40.0 on Linux Mint 22 XFCE. Hook (PreToolUse → rtk hook claude) is active and intercepting correctly — rtk gain shows 87% savings on covered commands. rtk discover flags these high-frequency commands as still unhandled over 30 days / 197 sessions / 3583 Bash calls:

Command	Count (30d)	Example
systemctl	122	systemctl --user restart voz-daemon.service
python3	114	python3 /home/techsphere/scripts/clima_full.py --tv
ssh	59	ssh -o ConnectTimeout=4 -o BatchMode=yes ...
adb shell	54	adb shell getprop service.adb.tcp.port
pgrep	48	pgrep -af scrcpy
pactl list	37	pactl list short sinks
xrandr	30	DISPLAY=:0 xrandr --listmonitors
pkill	24	pkill -f "scrcpy.*serial"
crontab	20	crontab -l
pactl info	12	pactl info

Context: Linux automation workspace — TV control (LG WebOS), PipeWire audio routing, voice daemon (Vosk STT), scrcpy bridge to Galaxy A02. Output of systemctl status, pactl list, xrandr --listmonitors, adb shell getprop is verbose and would benefit most.

Priority guess: systemctl + python3 + pactl list together would recover ~50% of the unhandled volume.

Happy to test pre-release builds.