feat: enable Mermaid support in MDX through remark plugin integration

documentation/source.config.ts

@@ -4,6 +4,7 @@ import {
 	frontmatterSchema,
 	metaSchema,
 } from "fumadocs-mdx/config";
+import {remarkMdxMermaid} from "fumadocs-core/mdx-plugins";
 
 // You can customise Zod schemas for frontmatter and `meta.json` here
 // see https://fumadocs.dev/docs/mdx/collections
@@ -14,6 +15,9 @@ export const docs = defineDocs({
 		postprocess: {
 			includeProcessedMarkdown: true,
 		},
+		mdxOptions: {
+			remarkPlugins: [remarkMdxMermaid],
+		},
 	},
 	meta: {
 		schema: metaSchema,