added installer shell script and additional steps

install.sh

@@ -0,0 +1,36 @@
+#!/bin/bash
+set -e
+
+INSTALL_URL="https://github.com/miasma-os/miasma-installer/releases/latest/download/miasma-installer"
+INSTALL_PATH="/usr/local/bin/miasma-installer"
+
+echo "Miasma OS Installer"
+echo "==================="
+echo ""
+
+if [ "$EUID" -ne 0 ]; then
+    echo "Error: This installer must be run as root"
+    echo "Please run: sudo curl -fsSL https://install.miasma-os.com | sh"
+    exit 1
+fi
+
+if [ ! -d "/sys/firmware/efi" ]; then
+    echo "Error: UEFI boot mode not detected"
+    echo "Miasma OS requires UEFI boot mode"
+    exit 1
+fi
+
+if ! command -v archinstall &> /dev/null; then
+    echo "Installing archinstall..."
+    pacman -Sy --noconfirm archinstall
+fi
+
+echo "Downloading Miasma installer..."
+curl -fsSL "$INSTALL_URL" -o "$INSTALL_PATH"
+chmod +x "$INSTALL_PATH"
+
+echo ""
+echo "Starting Miasma OS installer..."
+echo ""
+
+exec "$INSTALL_PATH"