feat: add offline installer script for ProxMenux

- Clones ProxMenux repository to temporary location and executes installation
- Includes automatic cleanup of temporary files and git dependency check
- Adds colored output and error handling for better user experience

install_proxmenux_offline.sh

@@ -0,0 +1,73 @@
+#!/bin/bash
+
+# ==========================================================
+# ProxMenux Offline Installer
+# ==========================================================
+# This script clones the ProxMenux repository to a temporary
+# location, runs the installer, and then cleans up.
+# ==========================================================
+
+set -e  # Exit on error
+
+# Configuration
+REPO_URL="https://github.com/c78-contrib/ProxMenuxOffline.git"
+TEMP_DIR="/tmp/proxmenux-install-$$"
+INSTALLER_SCRIPT="install_proxmenux.sh"
+
+# Colors for output
+RED='\033[0;31m'
+GREEN='\033[0;32m'
+YELLOW='\033[1;33m'
+NC='\033[0m' # No Color
+
+# Cleanup function
+cleanup() {
+    if [ -d "$TEMP_DIR" ]; then
+        echo -e "${YELLOW}Cleaning up temporary files...${NC}"
+        rm -rf "$TEMP_DIR"
+        echo -e "${GREEN}Cleanup completed.${NC}"
+    fi
+}
+
+# Set trap to ensure cleanup on exit
+trap cleanup EXIT
+
+# Check if running as root
+if [ "$(id -u)" -ne 0 ]; then
+    echo -e "${RED}Error: This script must be run as root.${NC}"
+    exit 1
+fi
+
+# Check if git is installed
+if ! command -v git &> /dev/null; then
+    echo -e "${YELLOW}Git is not installed. Installing git...${NC}"
+    apt-get update -qq
+    apt-get install -y git
+fi
+
+# Clone repository
+echo -e "${GREEN}Cloning ProxMenux repository...${NC}"
+if ! git clone --depth 1 "$REPO_URL" "$TEMP_DIR" 2>&1; then
+    echo -e "${RED}Error: Failed to clone repository from $REPO_URL${NC}"
+    exit 1
+fi
+
+# Change to temporary directory
+cd "$TEMP_DIR"
+
+# Check if installer exists
+if [ ! -f "$INSTALLER_SCRIPT" ]; then
+    echo -e "${RED}Error: Installer script '$INSTALLER_SCRIPT' not found in repository.${NC}"
+    exit 1
+fi
+
+# Make installer executable
+chmod +x "$INSTALLER_SCRIPT"
+
+# Run the installer
+echo -e "${GREEN}Running ProxMenux installer...${NC}"
+echo "----------------------------------------"
+bash "$INSTALLER_SCRIPT"
+
+echo "----------------------------------------"
+echo -e "${GREEN}Installation completed successfully!${NC}"