feat: add tubearchivist widget

src/widgets/tubearchivist/widget.js

@@ -0,0 +1,23 @@
+import credentialedProxyHandler from "utils/proxy/handlers/credentialed";
+
+const widget = {
+  api: "{url}/api/{endpoint}",
+  proxyHandler: credentialedProxyHandler,
+
+  mappings: {
+    downloads: {
+      endpoint: "download",
+    },
+    videos: {
+      endpoint: "video",
+    },
+    channels: {
+      endpoint: "channel",
+    },
+    playlists: {
+      endpoint: "playlist",
+    },
+  },
+};
+
+export default widget;