Add markdown linting script (#2585)

package.json

@@ -11,6 +11,8 @@
     "publish": "changeset publish",
     "playwright": "pnpm run build && pnpm run vt",
     "reformat-md": "node .build/reformat-md.mjs",
+    "lint": "pnpm run lint-md",
+    "lint-md": "markdownlint docs/content/**/*.md",
     "zip-package": "node .build/zip-package.mjs",
     "start": "pnpm dev"
   },
@@ -32,16 +34,17 @@
     "fs-extra": "^11.3.3",
     "glob": "^13.0.0",
     "js-beautify": "^1.15.4",
+    "markdownlint-cli": "^0.47.0",
     "nodemon": "^3.1.11",
     "pnpm": "^10.6.5",
     "postcss": "^8.5.6",
     "postcss-cli": "^11.0.1",
     "prettier": "^3.7.4",
-    "vite": "^7.3.0",
     "rtlcss": "^4.3.0",
     "sass": "1.97.2",
     "shelljs": "^0.10.0",
     "terser": "^5.44.1",
-    "turbo": "^2.7.3"
+    "turbo": "^2.7.3",
+    "vite": "^7.3.0"
   }
 }