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.

backend/api/v1/endpoints/ping.py

@@ -0,0 +1,9 @@
+# backend/api/endpoints/ping.py
+
+from fastapi import APIRouter
+
+router = APIRouter()
+
+@router.get("/ping")
+async def ping():
+    return {"message": "pong"}

backend/api/v1/router.py

@@ -0,0 +1,7 @@
+# backend/api/router.py
+
+from fastapi import APIRouter
+from backend.api.v1.endpoints import ping
+
+router = APIRouter()
+router.include_router(ping.router, prefix="/api/v1")

backend/main.py

@@ -0,0 +1,24 @@
+# backend/main.py
+
+from fastapi import FastAPI
+from fastapi.middleware.cors import CORSMiddleware
+from backend.api.v1.router import router
+
+app = FastAPI(
+    title="Fitz Backend",
+    description="API para interacción con el frontend y ejecución de tareas",
+    version="0.1.0"
+)
+
+# Configuración de CORS
+app.add_middleware(
+    CORSMiddleware,
+    allow_origins=["http://localhost:5173"],  # Solo permite tu frontend local
+    allow_credentials=True,
+    allow_methods=["*"],
+    allow_headers=["*"],
+)
+
+
+# Incluye las rutas de tu API
+app.include_router(router)