switch timer and interval to new namespace

src/content/docs/modules/time/timer.md

@@ -0,0 +1,19 @@
+---
+title: Timer
+sidebar:
+    order: 1
+---
+The `time.timer` module emits only one message after a specified duration. Sending any message to this module will reset the timer.
+
+- **type**: `time.timer`
+- **params**:
+    - **duration**: time in milliseconds to wait before emitting message
+
+### Example snippet
+Emits a message 5 seconds after the module is initialized
+```
+- id: 5secs
+  type: time.timer
+    params:
+      duration: 5000
+```