Refactor project structure and implement new features

- Removed unused security module and updated import paths.
- Enhanced OpenAI client with streaming capabilities for chat completions.
- Added new backend API endpoints for health check (ping).
- Established a new FastAPI application with CORS configuration.
- Created a new Appshell component for the frontend with navigation links.
- Integrated SVG icons and improved styling for the Appshell component.
- Implemented memory management for conversation history using PostgreSQL.
- Developed abstract classes for AI agents and models, with OpenAI integration.
- Added encryption utilities for secure data handling.

frontend/src/components/MetodoSelect.tsx

@@ -1,5 +1,5 @@
 import { Select, Group } from '@mantine/core';
-import { IconCheck } from '@tabler/icons-react';
+import { IconCheck } from '../assets/icons';
 
 interface MetodoSelectProps {
   metodo: string;
@@ -37,7 +37,7 @@ export function MetodoSelect({ metodo, setMetodo }: MetodoSelectProps) {
       renderOption={({ option, checked }) => (
         <Group style={{ color: colorMap[option.value], fontWeight: 600 }}>
           {option.label}
-          {checked && <IconCheck size={14} />}
+          {checked && <IconCheck/>}
         </Group>
       )}
       styles={{