Add markdownlint configuration file

Author: brown9804

.github/.markdownlint.json

@@ -0,0 +1,12 @@
+{
+  "default": true,
+  "MD005": false,
+  "MD009": false,
+  "MD013": false,
+  "MD028": false, 
+  "MD029": false,
+  "MD033": false,
+  "MD048": false,
+  "MD040": false, 
+  "MD041": false
+}