feat(ui): add Button, Modal, Spinner, Toast, and Tooltip components with styles

- Implemented Button component with various props for customization.
- Created Modal component with header, content, and footer subcomponents.
- Added Spinner component for loading indicators.
- Developed Toast component for displaying notifications.
- Introduced Tooltip component for contextual hints with keyboard shortcuts.
- Added corresponding CSS modules for styling each component.
- Updated index file to export new components.
- Configured TypeScript settings for the UI package.

packages/constants/src/index.ts

@@ -0,0 +1,9 @@
+export { ChannelTypes } from './ChannelTypes';
+export {
+	PermissionFlags,
+	hasPermission,
+	combinePermissions,
+	MAX_ROLES_PER_SERVER,
+} from './PermissionFlags';
+export { StatusTypes, PresenceStatus } from './StatusTypes';
+export { Routes } from './Routes';