Feature: Vikunja service widget (#4118)

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

src/widgets/vikunja/widget.js

@@ -0,0 +1,27 @@
+import credentialedProxyHandler from "utils/proxy/handlers/credentialed";
+import { asJson } from "utils/proxy/api-helpers";
+
+const widget = {
+  api: `{url}/api/v1/{endpoint}`,
+  proxyHandler: credentialedProxyHandler,
+
+  mappings: {
+    projects: {
+      endpoint: "projects",
+    },
+    tasks: {
+      endpoint: "tasks/all?filter=done%3Dfalse&sort_by=due_date",
+      map: (data) =>
+        asJson(data).map((task) => ({
+          id: task.id,
+          title: task.title,
+          priority: task.priority,
+          dueDate: task.due_date,
+          dueDateIsDefault: task.due_date === "0001-01-01T00:00:00Z",
+          inProgress: task.percent_done > 0 && task.percent_done < 1,
+        })),
+    },
+  },
+};
+
+export default widget;