Add statefulStates page to the Kubernetes dashboard - iteration 1

With the first MR, add a Vue router for the workload types. We can add pages to the router one by one with every next MR.

Render the StatefulStates page as per design:

The data to include in the first iteration:

1. Single stats for the StatefulStates statuses.

2. Sortable table with the following fields:

   • name
   • status
   • namespace
   • age

   Use standard pagination for the table.

Get the data using the client queries similar to how it works on the Environment page.