Assign Role To User
POST/workspaces/:workspace_id/roles
Assigns a role to a user in a workspace.
Args: payload (UserRole): The payload containing the organization id, user email, and role to assign. workspace_id (str): The ID of the workspace. request (Request): The FastAPI request object.
Returns: bool: True if the role was successfully assigned, False otherwise.
Raises: HTTPException: If the user does not have permission to perform this action. HTTPException: If there is an error assigning the role to the user.