feat: convert file manager into a plugin

plugins/file-manager/src/frontend/homepage/FileManagerWidgetEditForm.tsx

@@ -0,0 +1,18 @@
+import type {
+  FileManagerWidgetConfig,
+  WidgetEditFormProps,
+} from "@/types/homepage-types";
+import { SingleHostEditForm } from "@/features/homepage/dialogs/SingleHostEditForm";
+
+export function FileManagerWidgetEditForm({
+  config,
+  onChange,
+}: WidgetEditFormProps<FileManagerWidgetConfig>) {
+  return (
+    <SingleHostEditForm
+      hostId={config.hostId}
+      onChange={(hostId) => onChange({ ...config, hostId })}
+      filter={(h) => !!(h.enableSsh && h.enableFileManager)}
+    />
+  );
+}