Add install script for mac-agent

mac-agent/uninstall.sh

@@ -0,0 +1,10 @@
+#!/bin/bash
+set -e
+
+LABEL="com.user.kb-focus"
+PLIST="$HOME/Library/LaunchAgents/$LABEL.plist"
+
+launchctl bootout "gui/$(id -u)/$LABEL" 2>/dev/null || true
+rm -f "$PLIST"
+
+echo "Uninstalled $LABEL"