Add pfSense API widget (#1491)

* Add support for pfSense API

* Fix linting issues

* remove a line

* rename cpu to load in default block

* Re-order container blocks to ensure defaults show

* simplify pfsense widget, rename, limit blocks

---------

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

src/widgets/pfsense/widget.js

@@ -0,0 +1,24 @@
+
+import genericProxyHandler from "utils/proxy/handlers/generic";
+
+const widget = {
+  api: "{url}/api/v1/{endpoint}",
+  proxyHandler: genericProxyHandler,
+  
+  mappings: {
+    system: {
+      endpoint: "status/system",
+      validate: [
+        "data"
+      ]
+    },
+    interface: {
+      endpoint: "status/interface",
+      validate: [
+        "data"
+      ]
+    }
+  },
+};
+
+export default widget;