Add hardware layout docs and PERC H730 non-RAID setup script

Initial structure for R730xd passthrough configuration:
- README with VM layout table and setup order
- docs/hardware-layout.md: bay/GPU/USB mapping worksheet
- scripts/perc-nonraid.sh: convert H730 drives to per-disk non-RAID mode

https://claude.ai/code/session_01TxTSnxDjgEVuNztdsWQjMD

scripts/perc-nonraid.sh

@@ -0,0 +1,53 @@
+#!/usr/bin/env bash
+# Convert PERC H730 drives to Non-RAID (per-disk passthrough) mode.
+# Run once on the Proxmox host before assigning drives to VMs.
+# Requires: perccli (install from Dell's website or local .deb)
+#
+# Dell PERC H730 does not have a true HBA/IT mode. Non-RAID mode is the
+# equivalent — each disk is presented directly to the OS with SMART intact.
+
+set -euo pipefail
+
+PERCCLI=$(command -v perccli || command -v perccli64 || true)
+if [[ -z "$PERCCLI" ]]; then
+  echo "perccli not found. Install from:"
+  echo "  https://www.dell.com/support (search 'PERCCLI')"
+  echo "  or: dpkg -i perccli_*.deb"
+  exit 1
+fi
+
+echo "=== Controller overview ==="
+$PERCCLI show
+
+echo ""
+echo "=== Drives on controller 0 ==="
+$PERCCLI /c0 /eall /sall show
+
+echo ""
+read -rp "Proceed with converting all non-OS drives to Non-RAID mode? [y/N] " confirm
+[[ "$confirm" =~ ^[Yy]$ ]] || { echo "Aborted."; exit 0; }
+
+# Identify enclosure IDs (typically 8 for the internal backplane on R730xd)
+ENCLOSURES=$($PERCCLI /c0 /eall show | awk '/^[0-9]/{print $1}' | sort -u)
+
+for enc in $ENCLOSURES; do
+  echo ""
+  echo "=== Processing enclosure $enc ==="
+  SLOTS=$($PERCCLI /c0 /e"$enc" /sall show | awk '/UGood|Onln|JBOD|DHS/{print $2}' | sort -u)
+
+  for slot in $SLOTS; do
+    echo -n "  Slot $slot: setting to Good... "
+    $PERCCLI /c0 /e"$enc" /s"$slot" set good force 2>&1 | grep -i "success\|error\|already" || true
+
+    echo -n "  Slot $slot: setting to Non-RAID... "
+    $PERCCLI /c0 /e"$enc" /s"$slot" set nonraid 2>&1 | grep -i "success\|error\|already" || true
+  done
+done
+
+echo ""
+echo "=== Final drive state ==="
+$PERCCLI /c0 /eall /sall show
+
+echo ""
+echo "Done. Reboot the host for changes to take full effect."
+echo "After reboot, run build-bay-map.sh to map bays to /dev/disk/by-id paths."