feat: Added setting and method to control Livechat system messages visibility (#31751)

.changeset/cyan-shoes-fly.md

apps/meteor/app/livechat/server/api/lib/livechat.ts

apps/meteor/app/livechat/server/lib/LivechatTyped.ts

apps/meteor/ee/app/livechat-enterprise/server/settings.ts

packages/i18n/src/locales/en.i18n.json

packages/i18n/src/locales/pt-BR.i18n.json

packages/livechat/src/helpers/canRenderMessage.ts

packages/livechat/src/lib/hooks.ts

packages/livechat/src/store/index.tsx

packages/livechat/src/widget.ts