Add markdown linters

package.json

@@ -109,6 +109,7 @@
     "xml2js": "^0.4.16"
   },
   "devDependencies": {
+    "@github/markdownlint-github": "^0.1.0",
     "@types/byline": "^4.2.31",
     "@types/classnames": "^2.2.2",
     "@types/codemirror": "5.60.4",
@@ -159,6 +160,7 @@
     "electron-winstaller": "^5.0.0",
     "eslint-plugin-github": "^4.3.7",
     "jest-esm-transformer": "^1.0.0",
+    "markdownlint-cli": "^0.32.2",
     "reserved-words": "^0.1.2",
     "tsconfig-paths": "^3.9.0"
   }