feat(ui): fold the Workflows page into Dashboard → Analytics → Workflow

The workflow analytics now render under the Analytics tab's Workflow
sub-tab; ?tab= and ?sub= deep-link the Dashboard, /workflows redirects there,
and the sidebar drops its Workflows item.

client/src/i18n/locales/en/nav.json

@@ -64,7 +64,6 @@
   "upToDate": "Up to date",
   "updateAvailable": "Update available",
   "website": "Website",
-  "workflows": "Workflows",
   "workspace": "Workspace",
   "wsEndpoint": "WebSocket",
   "releaseAvailable": "{{version}} available",

client/src/i18n/locales/vi/nav.json

@@ -64,7 +64,6 @@
   "upToDate": "Đã là mới nhất",
   "updateAvailable": "Có bản cập nhật",
   "website": "Website",
-  "workflows": "Quy trình",
   "workspace": "Không gian làm việc",
   "wsEndpoint": "WebSocket",
   "releaseAvailable": "Có {{version}}",