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/package.json

@@ -23,6 +23,7 @@
     "@mantine/core": "8.0.0",
     "@mantine/hooks": "8.0.0",
     "@react-three/fiber": "^9.1.2",
+    "@tabler/icons": "^3.31.0",
     "@tabler/icons-react": "^3.31.0",
     "react": "^19.1.0",
     "react-dom": "^19.1.0",
@@ -60,6 +61,7 @@
     "typescript": "^5.8.2",
     "typescript-eslint": "^8.27.0",
     "vite": "^6.2.2",
+    "vite-plugin-svgr": "^4.3.0",
     "vite-tsconfig-paths": "^5.1.4",
     "vitest": "^3.0.9"
   },