… components

- Introduced a new rules file for Ant Design component imports, enforcing the use of centralized imports from `@antd-imports` to enhance tree-shaking, maintainability, and performance.
- Updated various components to replace direct imports from 'antd' and '@ant-design/icons' with the centralized import path.
- Refactored existing components to utilize memoization and callbacks for improved performance and readability.
- Enhanced the billing and configuration components with updated styles and improved user experience.

- Replaced direct imports from 'antd' with centralized imports from '@/shared/antd-imports' to align with new import rules and improve maintainability.

- Replaced direct import of '@ant-design/icons' with centralized import from '@/shared/antd-imports'

…rade plans component

- Introduced a new CSS file for responsive design in the upgrade plans component, enhancing mobile usability.
- Updated the upgrade plans component to utilize the new styles, ensuring a better layout on various screen sizes.
- Refactored seat count options logic for improved clarity and functionality.

…ot widget dark mode styles

- Updated the minimum seat value logic in the upgrade plans component to allow the current seat count.
- Added CSS overrides for the HubSpot widget to ensure proper display in dark mode, removing unwanted backgrounds and shadows.

- Moved Google Analytics and HubSpot integration scripts to separate modules for better organization and maintainability.
- Implemented an AnalyticsManager class to handle Google Analytics initialization and privacy notice display.
- Created a HubSpotManager class to manage HubSpot widget loading and dark mode theming.
- Updated index.html to reference the new modules, improving code clarity and separation of concerns.