dev: Add BETA branding to development branch

- Update launcher version to 2.1.0-BETA
- Change banner to yellow with dev warning
- Use .sysref.beta cache file for isolation
- Update README with dev branch information
- Clear visual separation from production

launcher.sh

@@ -1,16 +1,17 @@
 #!/bin/bash
 
 #############################################################################
-# Server Management Toolkit - Main Launcher
-# Version: 2.1
+# Server Management Toolkit - BETA/DEV Version
+# Version: 2.1-beta
 #
-# Streamlined menu showing only implemented features
+# Development and testing version - SEPARATE FROM PRODUCTION
+# Uses independent cache, config, and data directories
 #############################################################################
 
 set -eo pipefail
 
 # Configuration
-SUITE_VERSION="2.1.0"
+SUITE_VERSION="2.1.0-BETA"
 BASE_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
 MODULES_DIR="$BASE_DIR/modules"
 LIB_DIR="$BASE_DIR/lib"
@@ -36,10 +37,12 @@ NC='\033[0m'
 # Banner
 show_banner() {
     clear
-    echo -e "${CYAN}═══════════════════════════════════════════════════════════════${NC}"
-    echo -e "${CYAN}     ⚡ Server Management Toolkit v${SUITE_VERSION}${NC}"
-    echo -e "${CYAN}     Complete cPanel/Linux Server Administration Suite${NC}"
-    echo -e "${CYAN}═══════════════════════════════════════════════════════════════${NC}"
+    echo -e "${YELLOW}═══════════════════════════════════════════════════════════════${NC}"
+    echo -e "${YELLOW}     ⚠️  Server Management Toolkit v${SUITE_VERSION}${NC}"
+    echo -e "${YELLOW}     🧪 BETA/DEV VERSION - Testing & Development${NC}"
+    echo -e "${YELLOW}     Complete cPanel/Linux Server Administration Suite${NC}"
+    echo -e "${YELLOW}═══════════════════════════════════════════════════════════════${NC}"
+    echo -e "${MAGENTA}     ⚠️  This is a SEPARATE INSTANCE from production${NC}"
     echo ""
 }