build(docs): add mermaid support for documentation

Add @docusaurus/theme-mermaid dependency and configure docusaurus to enable mermaid diagrams in markdown

Author: bonkzero404

docs/docusaurus.config.js

@@ -51,6 +51,11 @@ const config = {
         ],
     ],
 
+    themes: ['@docusaurus/theme-mermaid'],
+    markdown: {
+        mermaid: true,
+    },
+
     themeConfig:
         /** @type {import('@docusaurus/preset-classic').ThemeConfig} */
         ({