docs: add networkmanager module documentation

docs/modules/Networkmanager.md

@@ -0,0 +1,72 @@
+Displays network connectivity information. Requires NetworkManager.
+
+## Configuration
+
+> Type: `networkmanager`
+
+| Name        | Type      | Default | Description             |
+|-------------|-----------|---------|-------------------------|
+| `icon_size` | `integer` | `24`    | Size to render icon at. |
+
+<details>
+<summary>JSON</summary>
+
+```json
+{
+  "end": [
+    {
+      "type": "networkmanager",
+      "icon_size": 32
+    }
+  ]
+}
+```
+
+</details>
+
+<details>
+<summary>TOML</summary>
+
+```toml
+[[end]]
+type = "networkmanager"
+icon_size = 32
+```
+
+</details>
+
+<details>
+<summary>YAML</summary>
+
+```yaml
+end:
+  - type: "networkmanager"
+    icon_size: 32
+```
+
+</details>
+
+<details>
+<summary>Corn</summary>
+
+```corn
+{
+  end = [
+    {
+      type = "networkmanager"
+      icon_size = 32
+    }
+  ]
+}
+```
+
+</details>
+
+## Styling
+
+| Selector               | Description                      |
+|------------------------|----------------------------------|
+| `.networkmanager`      | NetworkManager widget container. |
+| `.networkmanger .icon` | NetworkManager widget icon.      |
+
+For more information on styling, please see the [styling guide](styling-guide).