[pipelines/destination] add LightDB State data destination

Adds docs for LightDB State data destination.

Signed-off-by: Daniel Mangum <georgedanielmangum@gmail.com>

Author: hasheddan

docs/data-routing/4-destinations/14-lightdb-state.md

@@ -0,0 +1,60 @@
+---
+title: lightdb-state
+---
+
+|   |   |
+|---|:---:|
+|__Latest Version__| `v1.0.0` |
+|__Input Content Type__| `application/json` |
+
+:::usage
+Sending data to LightDB State incurs usage costs after exceeding the free tier.
+See [Golioth pricing](https://golioth.io/pricing) for more information.
+:::
+
+The LightDB State destination sends data to [LightDB
+State](/application-services/lightdb-state). Data must arrive as or be
+transformed into JSON in order to be successfully delivered to LightDB State.
+
+If a `path` is specified, it will be used to nest the message data in the
+device's LightDB State JSON document. If the `path` parameter is omitted, the
+stream path will be used for nesting.
+
+### Parameters
+
+|Parameter|Type|Description|Required|
+|---|---|---|:---:|
+|`path`|`string`| A fixed path to nest the JSON object. | |
+
+### Example Usage
+
+Because LightDB State is hosted by Golioth, no credentials are required to
+deliver data to the service.
+
+```yaml
+    destination:
+      type: lightdb-state
+      version: v1
+      parameters:
+        path: /latest/stream
+```
+
+### Example Input
+
+```json
+{
+  "temp": 32
+}
+```
+
+### Example Output
+
+```json
+{
+  "latest": {
+    "stream": {
+      "temp": 32
+    }
+  }
+}
+```