feat: add version checking capability to MCP server

- Add version metadata (__version__, __updated__, __author__)
- Create get_version tool that returns server information
- Include Python version, start time, and configuration details
- Add comprehensive tests for version functionality
- Update existing tests to handle new tool count

Now you can check the server version from Claude by asking:
"Can you get the version of the Gemini MCP server?"

Version: 2.2.0
Updated: 2025-06-08
Author: Fahad Gilani

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

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

gemini_server.py

@@ -7,6 +7,7 @@ Enhanced for large-scale code analysis with 1M token context window
 import asyncio
 import json
 import os
+from datetime import datetime
 from pathlib import Path
 from typing import Any, Dict, List, Optional, Tuple
 
@@ -17,6 +18,11 @@ from mcp.server.stdio import stdio_server
 from mcp.types import TextContent, Tool
 from pydantic import BaseModel, Field
 
+# Version and metadata
+__version__ = "2.2.0"
+__updated__ = "2025-06-08"
+__author__ = "Fahad Gilani"
+
 # Default to Gemini 2.5 Pro Preview with maximum context
 DEFAULT_MODEL = "gemini-2.5-pro-preview-06-05"
 MAX_CONTEXT_TOKENS = 1000000  # 1M tokens
@@ -277,6 +283,11 @@ async def handle_list_tools() -> List[Tool]:
             description="List available Gemini models",
             inputSchema={"type": "object", "properties": {}},
         ),
+        Tool(
+            name="get_version",
+            description="Get the version and metadata of the Gemini MCP Server",
+            inputSchema={"type": "object", "properties": {}},
+        ),
     ]
 
 
@@ -426,6 +437,33 @@ marked with their paths and content boundaries."""
         except Exception as e:
             return [TextContent(type="text", text=f"Error listing models: {str(e)}")]
 
+    elif name == "get_version":
+        # Return version and metadata information
+        version_info = {
+            "version": __version__,
+            "updated": __updated__,
+            "author": __author__,
+            "default_model": DEFAULT_MODEL,
+            "max_context_tokens": f"{MAX_CONTEXT_TOKENS:,}",
+            "python_version": f"{os.sys.version_info.major}.{os.sys.version_info.minor}.{os.sys.version_info.micro}",
+            "server_started": datetime.now().isoformat(),
+        }
+        
+        return [TextContent(
+            type="text",
+            text=f"""🤖 Gemini MCP Server v{__version__}
+Updated: {__updated__}
+Author: {__author__}
+
+Configuration:
+• Default Model: {DEFAULT_MODEL}
+• Max Context: {MAX_CONTEXT_TOKENS:,} tokens
+• Python: {version_info['python_version']}
+• Started: {version_info['server_started']}
+
+For updates, visit: https://github.com/BeehiveInnovations/gemini-mcp-server"""
+        )]
+
     else:
         return [TextContent(type="text", text=f"Unknown tool: {name}")]