feat(router): mount pages-v2 at /v2/* with v2- name prefix

Adds a second routesFolder (src/pages-v2 -> /v2/) and extends
getRouteName so v2 routes get a v2- NAME prefix, preventing collisions
with same-named v1 pages. getPascalCaseRouteName already folds the v2/
URL segment into the base name, so the leading v2- is stripped before
v2RouteName re-adds the canonical prefix (avoids v2-v2-dashboard).
Includes the regenerated typed-router.d.ts and a boot-proof
pages-v2/dashboard.vue placeholder.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

apps/app/typed-router.d.ts

@@ -63,6 +63,7 @@ declare module 'vue-router/auto-routes' {
     'register-success': RouteRecordInfo<'register-success', '/register/success', Record<never, never>, Record<never, never>>,
     'reset-password': RouteRecordInfo<'reset-password', '/reset-password', Record<never, never>, Record<never, never>>,
     'select-organisation': RouteRecordInfo<'select-organisation', '/select-organisation', Record<never, never>, Record<never, never>>,
+    'v2-dashboard': RouteRecordInfo<'v2-dashboard', '/v2/dashboard', Record<never, never>, Record<never, never>>,
     'verify-email-change': RouteRecordInfo<'verify-email-change', '/verify-email-change', Record<never, never>, Record<never, never>>,
   }
 }