[Tabs] Missing ARIA attributes

## Component
Tabs

## Problem
Missing proper ARIA attributes for tab pattern.

## Suggested Fix
Tab:
```tsx
<button
    role="tab"
    aria-selected={isSelected}
    aria-controls={panelId}
    tabIndex={isSelected ? 0 : -1}
>
```

TabPanel:
```tsx
<div
    role="tabpanel"
    id={panelId}
    aria-labelledby={tabId}
    tabIndex={0}
>
```

## Impact
Screen readers cannot navigate tabs properly