Add complete installation scripts for easy deployment

- install_rdp_client_complete.sh: Full-featured installer with auto-detection
- install_rdp_client_https.sh: Simple HTTPS-based installer
- INSTALL_INSTRUCTIONS.md: One-line installation commands and documentation

Features:
- Auto-detects Linux distribution (apt, dnf, yum, zypper, pacman)
- Installs all system dependencies automatically
- Sets up Python virtual environment
- Creates desktop entry and launcher
- Supports both SSH and HTTPS repository access
- Includes uninstall option
- Comprehensive error handling and user feedback

install_rdp_client_https.sh

@@ -0,0 +1,72 @@
+#!/bin/bash
+
+# RDP Client Simple Installation Script (HTTPS version)
+# This script clones the repository via HTTPS and installs all dependencies
+
+set -e  # Exit on any error
+
+# Colors for output
+RED='\033[0;31m'
+GREEN='\033[0;32m'
+YELLOW='\033[1;33m'
+BLUE='\033[0;34m'
+NC='\033[0m' # No Color
+
+# Configuration
+REPO_URL="https://gitea.egonetix.de/root/rdp_client.git"
+INSTALL_DIR="$HOME/rdp-client"
+
+echo -e "${BLUE}=== RDP Client Simple Installation (HTTPS) ===${NC}"
+echo "This script will download and install the RDP client using HTTPS."
+echo
+
+# Function to check if command exists
+command_exists() {
+    command -v "$1" >/dev/null 2>&1
+}
+
+# Install system dependencies
+echo -e "${YELLOW}Installing system dependencies...${NC}"
+if command_exists apt-get; then
+    sudo apt-get update
+    sudo apt-get install -y freerdp2-x11 python3 python3-pip python3-venv git python3-tk
+elif command_exists dnf; then
+    sudo dnf install -y freerdp python3 python3-pip git python3-tkinter
+elif command_exists pacman; then
+    sudo pacman -S --noconfirm freerdp python python-pip git tk
+else
+    echo -e "${RED}Please install manually: freerdp, python3, python3-pip, python3-tk, git${NC}"
+    exit 1
+fi
+
+# Clone repository
+echo -e "${YELLOW}Downloading RDP client...${NC}"
+if [ -d "$INSTALL_DIR" ]; then
+    echo "Updating existing installation..."
+    cd "$INSTALL_DIR" && git pull
+else
+    git clone "$REPO_URL" "$INSTALL_DIR"
+fi
+
+# Setup Python environment
+echo -e "${YELLOW}Setting up Python environment...${NC}"
+cd "$INSTALL_DIR"
+python3 -m venv .venv
+source .venv/bin/activate
+pip install --upgrade pip
+pip install cryptography
+
+# Create launcher
+echo -e "${YELLOW}Creating launcher...${NC}"
+mkdir -p "$HOME/.local/bin"
+cat > "$HOME/.local/bin/rdp-client" << EOF
+#!/bin/bash
+cd "$INSTALL_DIR"
+source .venv/bin/activate
+python rdp_client.py "\$@"
+EOF
+chmod +x "$HOME/.local/bin/rdp-client"
+
+echo -e "${GREEN}=== Installation Complete! ===${NC}"
+echo "Run with: rdp-client"
+echo "Or directly: $INSTALL_DIR/.venv/bin/python $INSTALL_DIR/rdp_client.py"