Replaced the 'IS_SIGN_UP_DISABLED' flag with 'IS_MULTIWORKSPACE_ENABLED' to control workspace creation. This change allows for conditional workspace setup based on the new environment variable. Also updated related service, resolver, and entity files.

Updated the IS_MULTIWORKSPACE_ENABLED setting description to indicate support for multiple workspaces. This update clarifies that a web server capable of managing subdomain wildcards is required.

Updated the .env.example file to replace the IS_SIGN_UP_DISABLED variable with IS_MULTIWORKSPACE_ENABLED. Removed the IS_SIGN_UP_DISABLED property from environment-variables.ts as it is no longer needed.

…nabled

Removed isSignUpDisabledState and associated references, and replaced them with isMultiworkspaceEnabledState. Updated GraphQL queries and related components to reflect this change, and ensured multi-workspace functionality is enabled where applicable.

Corrected the casing of the `isMultiWorkspaceEnabled` variable in the NavigationDrawerHeader component. This ensures consistent naming conventions and avoids potential bugs related to variable misnaming.

…kspace-flag

Corrected the typo from isMultiworkspaceEnabled to isMultiWorkspaceEnabled. This change affects multiple files to ensure consistency across the codebase, including GraphQL queries, state management, and server configurations.