Add wired networking configuration and sudo requirement

- Add DNS configuration with fallback servers (8.8.8.8, 1.1.1.1, etc.)
- Create /etc/network/interfaces for wired DHCP networking
- Add init-network script to bring up wired interface on boot
- Update init.c to call network initialization
- Update documentation to include sudo in default packages
- Update README with network testing and binary installation guide
- Update ARCHITECTURE.md with networking strategy details

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

rootfs/README.txt

@@ -3,6 +3,13 @@ SparkOS Root Filesystem
 
 This is the root filesystem for SparkOS, a minimal Linux distribution.
 
+Minimal System Packages:
+  - Linux Kernel (with networking support)
+  - SparkOS Init System (custom)
+  - Busybox (shell, utilities, networking)
+  - Git (for installing spark CLI)
+  - Sudo (privilege elevation)
+
 Directory Structure:
   /bin, /sbin       - Essential binaries
   /etc              - Configuration files
@@ -13,6 +20,17 @@ Directory Structure:
   /root             - Root home directory
   /home             - User home directories
 
+Network Configuration:
+  /etc/network/interfaces - Wired network (DHCP)
+  /etc/resolv.conf        - DNS configuration (8.8.8.8, 1.1.1.1)
+  /sbin/init-network      - Network initialization script
+
+Bootstrap Process:
+  1. System boots with wired networking (DHCP)
+  2. Use git to clone spark CLI repository
+  3. Use spark CLI to configure WiFi and system
+  4. Install additional packages via spark CLI
+
 Note: This is a minimal system. You'll need to populate /bin and /usr/bin
-with actual binaries (busybox, etc.) from a proper Linux system
+with actual binaries (busybox, git, sudo) from a proper Linux system
 or by cross-compiling.

rootfs/etc/network/interfaces

@@ -0,0 +1,10 @@
+# SparkOS Network Configuration
+# Wired networking only for bootstrapping
+
+# Loopback interface
+auto lo
+iface lo inet loopback
+
+# Primary wired interface (DHCP)
+auto eth0
+iface eth0 inet dhcp

rootfs/etc/resolv.conf

@@ -0,0 +1,6 @@
+# SparkOS DNS Configuration
+# Fallback to public DNS servers for reliability
+nameserver 8.8.8.8
+nameserver 8.8.4.4
+nameserver 1.1.1.1
+nameserver 1.0.0.1