docs: migrate wiki into main repo

docs/modules/Tray.md

@@ -0,0 +1,64 @@
+Displays a fully interactive icon tray using the KDE `libappindicator` protocol. 
+
+![Screenshot showing icon tray widget](https://user-images.githubusercontent.com/5057870/184540135-78ffd79d-f802-4c79-b09a-05a733dadc55.png)
+
+## Configuration
+
+> Type: `tray`
+
+***This module provides no configuration options.***
+
+<details>
+<summary>JSON</summary>
+
+```json
+{
+  "end": [
+    {
+      "type": "tray"
+    }
+  ]
+}
+```
+
+</details>
+
+<details>
+<summary>TOML</summary>
+
+```toml
+[[end]]
+type = "tray"
+```
+
+</details>
+
+<details>
+<summary>YAML</summary>
+
+```yaml
+end:
+  - type: "tray"
+```
+
+</details>
+
+<details>
+<summary>Corn</summary>
+
+```corn
+{
+  end = [
+    { type = "tray" }
+  ]
+}
+```
+
+</details>
+
+## Styling
+
+| Selector      | Description      |
+|---------------|------------------|
+| `#tray`       | Tray widget box  |
+| `#tray .item` | Tray icon button |