Tutorial category breakout (#437)

* Tutorial category breakout

* Put galleries in config

* restore default tutorial

* updated links

* update tutorials pages

* add infrared

docs/tutorials/infrared-sensor.md

@@ -0,0 +1,24 @@
+# Infrared sensor
+
+## Tutorials
+
+```codecard
+[{
+  "name": "Object Near",
+  "description": "Detect if objects are near.",
+  "cardType": "tutorial",
+  "url":"/tutorials/object-near",
+  "imageUrl":"/static/tutorials/object-near.png"
+}, {
+  "name": "Security Alert",
+  "description": "Build an security alert using the Infrared Sensor.",
+  "cardType": "tutorial",
+  "url":"/tutorials/security-alert",
+  "imageUrl":"/static/tutorials/security-alert.png"
+}]
+```
+
+## See Also
+
+[Object Near?](/tutorials/object-near),
+[Security Alert](/tutorials/security-alert)