feat: Create minimal Zero-OS initramfs with console support

- Fixed build system to clone source repositories instead of downloading binaries
- Enhanced scripts/fetch-github.sh with proper git repo cloning and branch handling
- Updated scripts/compile-components.sh for RFS compilation with build-binary feature
- Added minimal firmware installation for essential network drivers (73 modules)
- Created comprehensive zinit configuration set (15 config files including getty)
- Added util-linux package for getty/agetty console support
- Optimized package selection for minimal 27MB initramfs footprint
- Successfully builds bootable vmlinuz.efi with embedded initramfs
- Confirmed working: VM boot, console login, network drivers, zinit init system

Components:
- initramfs.cpio.xz: 27MB compressed minimal Zero-OS image
- vmlinuz.efi: 35MB bootable kernel with embedded initramfs
- Complete Zero-OS toolchain: zinit, rfs, mycelium compiled from source

scripts/fetch-github.sh

@@ -179,13 +179,52 @@ install_github_binary() {
     fi
 }
 
+# Function to clone source repository for compilation
+clone_source_repo() {
+    local repo="$1"
+    local target_dir="$2"
+    
+    echo "  Cloning source: $repo -> $target_dir"
+    
+    # Check if directory already exists and is a git repo
+    if [ -d "$target_dir/.git" ]; then
+        echo "    Repository already exists, updating..."
+        cd "$target_dir"
+        git fetch origin
+        git reset --hard HEAD
+        cd - >/dev/null
+    else
+        # Remove any existing non-git directory
+        if [ -d "$target_dir" ]; then
+            echo "    Removing existing non-git directory..."
+            rm -rf "$target_dir"
+        fi
+        
+        # Clone repository (use default branch)
+        echo "    Cloning https://github.com/$repo.git..."
+        git clone "https://github.com/$repo.git" "$target_dir"
+    fi
+    
+    echo "    ✓ Source repository cloned: $target_dir"
+}
+
 # Install each component
 echo ""
 
-# Zinit - Init system
-install_github_binary "threefoldtech/zinit" "zinit" "/sbin" "linux-x86_64"
+# Clone source repositories for compilation
+COMPONENTS_DIR="/build/components"
+mkdir -p "$COMPONENTS_DIR"
 
-# Core-X - Container control (skip if repo doesn't exist)
+# Zinit - Clone source for compilation
+clone_source_repo "threefoldtech/zinit" "$COMPONENTS_DIR/zinit"
+
+# Mycelium - Clone source for compilation
+clone_source_repo "threefoldtech/mycelium" "$COMPONENTS_DIR/mycelium"
+
+# RFS - Clone source for compilation
+clone_source_repo "threefoldtech/rfs" "$COMPONENTS_DIR/rfs"
+
+# Core-X - Container control (still download binary as it's not in compile-components.sh)
 echo "  Checking: threefoldtech/core-x"
 if install_github_binary "threefoldtech/core-x" "core-x" "/usr/bin" "linux.*amd64"; then
     echo "    Core-X installed successfully"
@@ -193,23 +232,34 @@ else
     echo "    Warning: Core-X repository not found or no releases available - continuing without it"
 fi
 
-# Seektime - Disk detection
+# Seektime - Disk detection (still download binary as it's not in compile-components.sh)
 install_github_binary "threefoldtech/seektime" "seektime" "/usr/bin" "linux-amd64"
 
-# RFS - Rust filesystem (direct binary, no architecture in name)
-install_github_binary "threefoldtech/rfs" "rfs" "/usr/bin" "rfs"
-
 echo ""
-echo "[+] GitHub components installed successfully"
+echo "[+] GitHub components setup completed"
+
+# Show cloned source repositories
+echo ""
+echo "[+] Cloned source repositories:"
+for repo in "zinit" "mycelium" "rfs"; do
+    if [ -d "$COMPONENTS_DIR/$repo/.git" ]; then
+        echo "  $repo (source cloned for compilation)"
+    else
+        echo "  $repo (MISSING)"
+    fi
+done
 
 # Show installed binaries info
 echo ""
-echo "[+] Installed components:"
-for binary in "/sbin/zinit" "/usr/bin/core-x" "/usr/bin/seektime" "/usr/bin/rfs"; do
+echo "[+] Downloaded binary components:"
+for binary in "/usr/bin/core-x" "/usr/bin/seektime"; do
     if [ -x "$INITRAMFS_ROOT$binary" ]; then
         size=$(stat -c%s "$INITRAMFS_ROOT$binary" 2>/dev/null || echo "unknown")
         echo "  $binary (${size} bytes)"
     else
         echo "  $binary (MISSING)"
     fi
-done
+done
+
+echo ""
+echo "[+] Note: zinit, mycelium, and rfs will be compiled from source using compile-components.sh"