Initial commit - Phase 3/4

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Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

systemd/dangerous-pi-cpu-cores.service

@@ -0,0 +1,14 @@
+[Unit]
+Description=Set default CPU cores (maxcpus) for Dangerous Pi
+# This service sets initial defaults in cmdline.txt on first boot
+# For Pi Zero 2 W, this defaults to 2 cores for thermal management
+After=local-fs.target
+Before=dangerous-pi.service
+
+[Service]
+Type=oneshot
+ExecStart=/opt/dangerous-pi/scripts/apply-cpu-cores.sh
+RemainAfterExit=yes
+
+[Install]
+WantedBy=multi-user.target