Add metadata for TimerTrigger Node

Templates/TimerTrigger/metadata.json

@@ -1,5 +1,5 @@
 {
-    "name": "TimerTrigger Nodejs Function",
+    "name": "TimerTrigger - Node",
     "language": "JavaScript",
-    "trigger": "TimerTrigger"
+    "category": "Core"
 }

Templates/TimerTrigger/readme.md

@@ -0,0 +1,11 @@
+# TimerTrigger - Node
+
+The `TimerTrigger` makes it incredibly easy to have your functions executed on a schedule. This sample demostrates a simple use case of calling your function every 5 minutes.
+
+## How it works
+
+For a `TimerTrigger` to work, you provide a schedule in the form of a [cron expression](https://en.wikipedia.org/wiki/Cron#CRON_expression)(See the link for full details). A cron expression is a string with 6 separate expressions which represent a given schedule via patterns. The pattern we use to represent every 5 minutes is `0 */5 * * * *`. This, in plain text, means: "When seconds is equal to 0, minutes is divisible by 5, for any hour, day of the month, month, day of the week, or year".
+
+## Learn more
+
+<TODO> Documentation