feat: add setup scripts and improve dependency installation

- Add setup.sh for macOS/Linux with dependency installation
- Add setup.bat for Windows with dependency installation
- Update README with clearer setup instructions in Quickstart
- Add troubleshooting for "ModuleNotFoundError: No module named 'mcp'"
- Provide manual installation steps as fallback

This helps users avoid the common "ModuleNotFoundError" by ensuring
dependencies are properly installed before first use.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

setup.sh

@@ -0,0 +1,65 @@
+#!/bin/bash
+
+# Gemini MCP Server Setup Script
+# This script helps users set up the virtual environment and install dependencies
+
+echo "🚀 Gemini MCP Server Setup"
+echo "========================="
+
+# Get the directory where this script is located
+SCRIPT_DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" && pwd )"
+cd "$SCRIPT_DIR"
+
+# Check if Python is installed
+if ! command -v python3 &> /dev/null; then
+    echo "❌ Error: Python 3 is not installed."
+    echo "Please install Python 3.10 or higher from https://python.org"
+    exit 1
+fi
+
+# Display Python version
+PYTHON_VERSION=$(python3 --version)
+echo "✓ Found $PYTHON_VERSION"
+
+# Check if venv exists
+if [ -d "venv" ]; then
+    echo "✓ Virtual environment already exists"
+else
+    echo "📦 Creating virtual environment..."
+    python3 -m venv venv
+    if [ $? -eq 0 ]; then
+        echo "✓ Virtual environment created"
+    else
+        echo "❌ Error: Failed to create virtual environment"
+        exit 1
+    fi
+fi
+
+# Activate virtual environment
+echo "🔧 Activating virtual environment..."
+source venv/bin/activate
+
+# Upgrade pip
+echo "📦 Upgrading pip..."
+pip install --upgrade pip
+
+# Install requirements
+echo "📦 Installing dependencies..."
+pip install -r requirements.txt
+
+if [ $? -eq 0 ]; then
+    echo ""
+    echo "✅ Setup completed successfully!"
+    echo ""
+    echo "Next steps:"
+    echo "1. Get your Gemini API key from: https://makersuite.google.com/app/apikey"
+    echo "2. Configure Claude Desktop with your API key (see README.md)"
+    echo "3. Restart Claude Desktop"
+    echo ""
+    echo "Note: The virtual environment has been activated for this session."
+    echo "The run_gemini.sh script will automatically activate it when needed."
+else
+    echo "❌ Error: Failed to install dependencies"
+    echo "Please check the error messages above and try again."
+    exit 1
+fi