Add github actions action

tests/test_docs.sh

@@ -0,0 +1,12 @@
+#!/bin/bash
+# Test Documentation boxes -
+# !!! <TYPE>: is not allowed!
+# !!! <TYPE> "title" - Title needs to be quoted!
+grep -Er '^!{3}\s\S+:|^!{3}\s\S+\s[^"]' docs/*
+
+if  [ $? -ne 0 ]; then
+    echo "Docs test success."
+    exit 0
+fi
+echo "Docs test failed."
+exit 1