feat: Implement main application shell with navigation and color scheme toggle

- Added Appshell component with responsive navbar and main content area
- Integrated ColorSchemeToggle for light/dark mode switching
- Created Welcome component with styled title and introductory text
- Developed ChatPage for LLM interaction with WebSocket support
- Implemented Biblioteca for managing notes with rich text editor
- Added LoginPage for user authentication with error handling
- Introduced MessageList and MessageBubble components for chat messages
- Styled components with CSS modules for consistent design

prueba_mcp.py

@@ -1,5 +1,5 @@
 import asyncio
-from src.Llms.MCPs.McpServer import MCPServerRunner
+from domains.Llms.MCPs.McpServer import MCPServerRunner
 
 async def main():
     venv_python = r"E:\Fitz_Studio\.venv\Scripts\python.exe"