Add AdGuard, Bazarr, and Coin Market Cap widgets

- Allow setting HTTP method in widget.js
- Allow sending allow listed query params to proxy

src/widgets/adguard/widget.js

@@ -0,0 +1,14 @@
+import genericProxyHandler from "utils/proxies/generic";
+
+const widget = {
+  api: "{url}/control/{endpoint}",
+  proxyHandler: genericProxyHandler,
+
+  mappings: {
+    "stats": {
+      endpoint: "stats",
+    },
+  },
+};
+
+export default widget;