feat(reui): update ReUI components and documentation

- Added new OIDC configuration options in `.env.example`.
- Expanded documentation in `AGENTS.md` to include OIDC endpoints and admin UI.
- Updated ReUI skill version and component count from 17 to 20 across various documentation files.
- Enhanced `README.md` and other related files to reflect the new component structure and usage guidelines.

Co-authored-by: Cursor <cursoragent@cursor.com>

apps/api/test/app-switcher.test.ts

@@ -19,9 +19,13 @@ describe('app-switcher API', () => {
     expect(body.apps.map((a) => a.id).sort()).toEqual([
       'bgp',
       'cfdm',
+      'dns',
       'fw',
       'vps',
     ])
+    expect(body.apps.find((a) => a.id === 'dns')).toMatchObject({
+      authMode: 'oidc',
+    })
     await app.close()
   })