Virtual Machines: refreshed creation wizard

The VM provisioning wizard got a redesign. Tighter step layout, clearer compute class picker with explicit Burst/Dedicated explanation and a link straight to the new Compute classes docs page. Storage classes now fit in two rows on a single screen with bandwidth and IOPS bars; network classes share the same visual language. Step 5 (Review) is rebuilt as a proper summary with detail cards and a cost sidebar that mirrors the footer total exactly. If you leave the name field blank, the placeholder is now used as the actual VM name. The hardware class "legacy" is presented as "Basic" in the picker.