feat(query): enable backend connection

apps/web/.env

apps/web/.env.development

apps/web/.env.production

apps/web/node.d.ts

apps/web/package.json

apps/web/src/app/app.tsx

apps/web/src/components/navbar/navbar.tsx

apps/web/src/environments/variables.ts

apps/web/vite.config.ts

libs/shared/.env

libs/shared/lib/data-access/api/database.ts

libs/shared/lib/data-access/api/query.ts

libs/shared/lib/data-access/api/schema.ts

libs/shared/lib/data-access/api/user.ts

libs/shared/lib/data-access/authorization/useAuth.jsx

...cess/socket/backend-message-receiver/WebSocketHandler.tsx

libs/shared/lib/data-access/store/authSlice.ts

libs/shared/lib/querybuilder/panel/querybuilder.module.scss

libs/shared/lib/querybuilder/panel/querybuilder.tsx

...rybuilder/pills/customFlowPills/entitypill/entitypill.tsx