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

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

rootfs/README.txt

@@ -0,0 +1,18 @@
+SparkOS Root Filesystem
+=======================
+
+This is the root filesystem for SparkOS, a minimal Linux distribution.
+
+Directory Structure:
+  /bin, /sbin       - Essential binaries
+  /etc              - Configuration files
+  /proc, /sys, /dev - Kernel interfaces
+  /tmp              - Temporary files
+  /usr              - User programs
+  /var              - Variable data
+  /root             - Root home directory
+  /home             - User home directories
+
+Note: This is a minimal system. You'll need to populate /bin and /usr/bin
+with actual binaries (bash, coreutils, etc.) from a proper Linux system
+or by cross-compiling.

rootfs/etc/fstab

@@ -0,0 +1,5 @@
+# <file system> <mount point> <type> <options> <dump> <pass>
+proc            /proc         proc    defaults          0 0
+sysfs           /sys          sysfs   defaults          0 0
+devtmpfs        /dev          devtmpfs defaults         0 0
+tmpfs           /tmp          tmpfs   defaults          0 0

rootfs/etc/group

@@ -0,0 +1 @@
+root:x:0:

rootfs/etc/hostname

@@ -0,0 +1 @@
+sparkos

rootfs/etc/hosts

@@ -0,0 +1,3 @@
+127.0.0.1   localhost
+127.0.1.1   sparkos
+::1         localhost ip6-localhost ip6-loopback

rootfs/etc/passwd

@@ -0,0 +1 @@
+root:x:0:0:root:/root:/bin/bash

rootfs/etc/profile

@@ -0,0 +1,11 @@
+# SparkOS System Profile
+
+export PATH=/bin:/sbin:/usr/bin:/usr/sbin
+export PS1='SparkOS:\w\$ '
+export HOME=/root
+export TERM=linux
+
+# Welcome message
+echo "Welcome to SparkOS!"
+echo "Type 'help' for available commands"
+echo ""

rootfs/root/.bashrc

@@ -0,0 +1,13 @@
+# SparkOS Root Bash Configuration
+
+# Set prompt
+PS1='SparkOS:\w# '
+
+# Aliases
+alias ls='ls --color=auto'
+alias ll='ls -lah'
+alias ..='cd ..'
+
+# Environment
+export EDITOR=vi
+export PAGER=less