feat: add comprehensive Windows/WSL support and documentation

Major improvements for Windows users:
- Add detailed Windows Setup Guide with native and WSL options
- Create platform-specific example configurations (Windows/WSL/macOS)
- Add troubleshooting section addressing common Windows/WSL errors
- Create test_wsl_setup.bat diagnostic script for Windows users

Script improvements:
- Enhance run_gemini.bat with error handling and helpful messages
- Update both run scripts to use server.py as main entry point
- Keep gemini_server.py as backward compatibility wrapper

Documentation:
- Add clear instructions for both native Windows and WSL setups
- Explain the wsl.exe bridge approach for WSL users
- Include performance recommendations for WSL file access
- Add specific troubleshooting for spawn ENOENT errors

All tests passing, code properly formatted and linted.

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

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

run_gemini.bat

@@ -4,6 +4,21 @@ REM Windows batch script to run Gemini MCP server
 REM Get the directory where this script is located
 set SCRIPT_DIR=%~dp0
 
-REM Activate the virtual environment and run the server
-call "%SCRIPT_DIR%venv\Scripts\activate.bat"
-python "%SCRIPT_DIR%gemini_server.py"
+REM Check if virtual environment exists
+if exist "%SCRIPT_DIR%venv\Scripts\activate.bat" (
+    REM Activate the virtual environment
+    call "%SCRIPT_DIR%venv\Scripts\activate.bat"
+    python "%SCRIPT_DIR%server.py"
+) else (
+    REM Try to use python directly if no venv
+    echo Warning: Virtual environment not found at %SCRIPT_DIR%venv >&2
+    echo Attempting to run with system Python... >&2
+    python "%SCRIPT_DIR%server.py"
+    if errorlevel 1 (
+        echo Error: Failed to run server. Please ensure Python is installed and dependencies are available. >&2
+        echo Run: python -m venv venv >&2
+        echo Then: venv\Scripts\activate >&2
+        echo Then: pip install -r requirements.txt >&2
+        exit /b 1
+    )
+)