Migrate MARP_CONTAINER_CLASS_NAME to consts and export it from growi-marpit

packages/presentation/src/client/consts/index.ts

@@ -1,6 +1,8 @@
 import type { Options as ReactMarkdownOptions } from 'react-markdown';
 import type { Options as RevealOptions } from 'reveal.js';
 
+export const MARP_CONTAINER_CLASS_NAME = 'marpit';
+
 export type PresentationOptions = {
   rendererOptions: ReactMarkdownOptions;
   revealOptions?: RevealOptions;

packages/presentation/src/client/services/growi-marpit.ts

@@ -2,7 +2,9 @@ import type { MarpOptions } from '@marp-team/marp-core';
 import { Marp } from '@marp-team/marp-core';
 import { Element } from '@marp-team/marpit';
 
-export const MARP_CONTAINER_CLASS_NAME = 'marpit';
+import { MARP_CONTAINER_CLASS_NAME } from '../consts';
+
+export { MARP_CONTAINER_CLASS_NAME };
 
 // Add data-line to Marp slide.
 // https://github.com/marp-team/marp-vscode/blob/d9af184ed12b65bb28c0f328e250955d548ac1d1/src/plugins/line-number.ts