Merge bootprocess branch overlay into 0.2.0

Restore all bootprocess branch files that were overwritten by later 0.2.0
commits. This overlay brings back the complete boot infrastructure:

- Configs: redbear-full, redbear-mini, redbear-device-services, driver .d files
- Kernel: IRQ affinity, x2APIC, C-states, NUMA (SLIT/SRAT), MCS locks, cpuidle
- Base patches: P0-P55 + new P6 (lived block_size=512) + P57 (fbbootlogd graceful init)
- Driver infra: driver-manager, udev-shim, thermald, cpufreqd, iommu, redox-driver-sys/core
- GPU: redox-drm with improved connector handling
- System: redbear-info, redbear-hwutils phase-timer-check
- Build system: fetch.rs improvements, build-iso.sh, run_full.sh
- Kernel source: new ACPI (SLIT, SRAT), cpuidle, cstate, MCS lock modules

83 files changed, +3966/-1248 lines

scripts/build-iso.sh

@@ -2,6 +2,12 @@
 
 set -euo pipefail
 
+# Ensure cargo bin (cbindgen, rustup, etc.) is in PATH
+case ":${PATH}:" in
+    *":$HOME/.cargo/bin:"*) ;;
+    *) export PATH="$HOME/.cargo/bin:$PATH" ;;
+esac
+
 CONFIG_NAME="redbear-mini"
 ARCH="x86_64"
 ALLOW_UPSTREAM=0

scripts/run_full.sh

@@ -1,3 +1,9 @@
 #!/bin/bash
 
+# Ensure cargo bin (cbindgen, rustup, etc.) is in PATH
+case ":${PATH}:" in
+    *":$HOME/.cargo/bin:"*) ;;
+    *) export PATH="$HOME/.cargo/bin:$PATH" ;;
+esac
+
 qemu-system-x86_64 -m 8G -drive if=pflash,format=raw,readonly=on,file=/usr/share/edk2/x64/OVMF_CODE.4m.fd -drive file=/home/kellito/Builds/rbos/build/x86_64/redbear-full.iso,format=raw -device virtio-gpu-pci -enable-kvm -serial mon:stdio