feat: add MDX checker script to package.json for improved documentati…

…on validation

https://docusaurus.io/blog/preparing-your-site-for-docusaurus-v3#using-the-mdx-checker-cli

package.json

@@ -19,7 +19,8 @@
     "serve": "npm run docusaurus -- serve",
     "write-translations": "npm run docusaurus -- write-translations",
     "write-heading-ids": "npm run docusaurus -- write-heading-ids",
-    "pdf": "npx docusaurus-prince-pdf -u http://127.0.0.1:8080 -d ./build -o ./build/open-sauced-docs.pdf -f ./open-sauced-docs.txt --include-index"
+    "pdf": "npx docusaurus-prince-pdf -u http://127.0.0.1:8080 -d ./build -o ./build/open-sauced-docs.pdf -f ./open-sauced-docs.txt --include-index",
+    "check-mdx": "npx docusaurus-mdx-checker"
   },
   "dependencies": {
     "@docusaurus/core": "^3.6.1",