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.

.gitignore

@@ -2,6 +2,7 @@
 
 # dependencies
 node_modules
+.pnpm-store/
 .pnp
 .pnp.js
 .idea/
@@ -70,6 +71,8 @@ apps/nextjs/public/images/background.png
 
 # personal agent config
 .opencode
+.agents/
+skills-lock.json
 
 # docusaurus
 apps/docs/.docusaurus