TypeScript compatibility (#379)

* Update file extensions and exports for TypeScript compatibility

* docs: fix typo in getting-started.md

* chore: add no-trailing-punctuation rule to VS Code settings

* feat: add @docusaurus/theme-mermaid for mermaid diagram support

* Update import paths for MermaidDiagram component

* remove redudndant check, use effect only runs after the component is mounted

* Update docusaurus.config.ts to fix syntax error

* bring back check because it's not possible to properly cancel a dynamic import

* feat: optimize dynamic import in CodeBlock component

* chore: update VS Code extensions.json with eslint recommendation

* Update docusaurus.config.ts to add GitHub repository link in header

.vscode/settings.json

@@ -4,6 +4,9 @@
     "no-inline-html": false,
     "link-image-reference-definitions": false,
     "commands-show-output": false,
-    "fenced-code-language": false
+    "fenced-code-language": false,
+    "no-trailing-punctuation": {
+      "punctuation": ".,;:。，；："
+    }
   }
 }