added widget for xteve (#731)

* added xteve widget

* eslint fixes

* xteve code cleanup

Co-authored-by: Marcus Kimpenhaus <k@AirM2.kimpenhaus.net>
Co-authored-by: Michael Shamoon <4887959+shamoon@users.noreply.github.com>

src/widgets/xteve/widget.js

@@ -0,0 +1,14 @@
+import xteveProxyHandler from "./proxy";
+
+const widget = {
+  api: "{url}/{endpoint}",
+  proxyHandler: xteveProxyHandler,
+
+  mappings: {
+    "api": {
+      endpoint: "api/",
+    },
+  },
+};
+
+export default widget;