fix: restore ArchiveTeam Warrior as a proper integration

The widget-only integrations refactor incorrectly removed the
ArchiveTeam Warrior integration entirely. It only needed to be
excluded from auto-seeding (by removing defaultUrl), not deleted.

This restores the integration class, reverts the widget/router/handler
to use integration middleware, and removes archiveTeamWarrior from the
widget-only-integrations migration.

packages/definitions/src/docs/integration-doc-slugs.ts

@@ -49,5 +49,6 @@ export const integrationDocSlugs: Record<IntegrationKind, string | null> = {
   gluetun: "gluetun",
   peaNut: "peanut",
   beszel: "beszel",
+  archiveTeamWarrior: null,
   mock: null,
 };