ci: add mlc_config.json to docs folder for link checker

Author: randygrok

docs/mlc_config.json

@@ -0,0 +1,8 @@
+{
+  "ignorePatterns": [
+    {
+      "pattern": "^https://medium\\.com"
+    }
+  ],
+  "aliveStatusCodes": [200, 206, 403]
+}