* [WEB-5559] improve: chat support functionality and remove Intercom provider
- Added ChatSupportModal component for chat support integration.
- Replaced IntercomProvider with ChatSupportModal in AppProvider.
- Introduced useChatSupport hook to manage chat support state and actions.
- Updated help commands to utilize chat support instead of Intercom.
- Removed obsolete Intercom-related components and hooks.
* refactor: lazy load ChatSupportModal in AppProvider
