adding a md linter to the lint process

.editorconfig

@@ -12,5 +12,7 @@ max_line_length = 80
 trim_trailing_whitespace = true
 
 [*.md]
+max_line_length = 80
+indent_style = space
 insert_final_newline = false
 trim_trailing_whitespace = false

.eslintignore

@@ -1,7 +1,6 @@
 build/
 .eslintrc.js
+.eslintrc.md.js
 docs/test-api
 ./node_modules/*
-*.md
-*.mdx
 LICENSE

.eslintrc.md.js

@@ -0,0 +1,20 @@
+module.exports = {
+  extends: [
+    "plugin:markdownlint/recommended",
+  ],
+  "parser": "eslint-plugin-markdownlint/parser",
+  "parserOptions": {
+    "ecmaVersion": "latest",
+    "sourceType": "module",
+    "ecmaFeatures": {
+      "jsx": true
+    },
+  },
+  rules: {
+    "markdownlint/md001": "off",
+    "markdownlint/md003": "warn",
+    "markdownlint/md025": ["error", {
+      "level": 2
+    }]
+  }
+};

package.json

@@ -16,7 +16,8 @@
     "write-heading-ids": "docusaurus write-heading-ids",
     "typecheck": "tsc",
     "typecheck-staged": "tsc-files --noEmit",
-    "lint": "npm run lint:spelling && npm run lint:js && npm run lint:style",
+    "lint": "npm run lint:spelling && npm run lint:md && npm run lint:js && npm run lint:style",
+    "lint:md": "eslint . --config .eslintrc.md.js --ext md,mdx --max-warnings=0",
     "lint:js": "eslint . --ext js,jsx,ts,tsx --max-warnings=0",
     "lint:spelling": "cspell \"**\" --no-progress",
     "lint:style": "stylelint \"**/*.css\"",
@@ -61,6 +62,7 @@
     "cspell": "^6.31.1",
     "cz-conventional-changelog": "^3.3.0",
     "semantic-release": "^21.0.0",
+    "eslint-plugin-markdownlint": "^0.6.0",
     "stylelint": "^15.0.0 ",
     "stylelint-config-standard": "^34.0.0",
     "tsc-files": "^1.1.4",