Feature: OpenWRT service widget (#2782)

* Feat: OpenWRT widget implementation

* Update proxy.js

* fixes from review

---------

Co-authored-by: shamoon <4887959+shamoon@users.noreply.github.com>

docs/widgets/services/openwrt.md

@@ -0,0 +1,54 @@
+---
+title: OpenWRT
+description: OpenWRT widget configuration
+---
+
+Learn more about [OpenWRT](https://openwrt.org/).
+
+Provides information from OpenWRT
+
+```yaml
+widget:
+  type: openwrt
+  url: http://host.or.ip
+  username: homepage
+  password: pass
+  interfaceName: eth0 # optional
+```
+
+## Interface
+
+Setting `interfaceName` (e.g. eth0) will display information for that particular device, otherwise the widget will display general system info.
+
+## Authorization
+
+In order for homepage to access the OpenWRT RPC endpoints you will need to [create an ACL](https://openwrt.org/docs/techref/ubus#acls) and [new user](https://openwrt.org/docs/techref/ubus#authentication) in OpenWRT.
+
+Create an ACL named `homepage.json` in `/usr/share/rpcd/acl.d/`, the following permissions will suffice:
+
+```
+{
+        "homepage": {
+                "description": "Homepage widget",
+                "read": {
+                        "ubus": {
+                                "network.interface.wan": ["status"],
+                                "network.interface.lan": ["status"],
+                                "network.device": ["status"]
+                                "system": ["info"]
+                        }
+                },
+        }
+}
+```
+
+Then add a user that will use that ACL in `/etc/config/rpc`:
+
+```config login
+        option username 'homepage'
+        option password '<password>'
+        list read homepage
+        list write '*'
+```
+
+This username and password will be used in Homepage's services.yaml to grant access.