Implement SparkOS MVP: init system, build infrastructure, and rootfs

Co-authored-by: johndoe6345789 <224850594+johndoe6345789@users.noreply.github.com>

config/build.conf

@@ -0,0 +1,33 @@
+# SparkOS Configuration
+# This file defines the build configuration for SparkOS
+
+# Target architecture
+ARCH=x86_64
+
+# Kernel version (if building custom kernel)
+KERNEL_VERSION=6.1
+
+# Image size for dd-able image
+IMAGE_SIZE=512M
+
+# Bootloader
+BOOTLOADER=syslinux
+
+# Init system
+INIT=sparkos-init
+
+# Default shell
+SHELL=/bin/bash
+
+# Compiler flags
+CFLAGS=-Wall -O2 -static
+LDFLAGS=-static
+
+# Root filesystem location
+ROOTFS=rootfs
+
+# Build directory
+BUILDDIR=build
+
+# Output image
+IMAGE=sparkos.img