ActiveLink: add support for aria-current attribute

**Enhancement**

`ActiveLink` would benefit from adding support for the [`aria-current`](https://developer.mozilla.org/en-US/docs/Web/API/Element/ariaCurrent) attribute. This could be achieved by adding an `ariaCurrent` property and setting it when the link is active.

```typescript
export interface ActiveLinkProperties extends LinkProperties {
activeClasses: SupportedClassName[];
ariaCurrent?: 'page' | 'step' | 'location' | 'date' | 'time' | true;
isExact?: boolean;
}
```

**Code**

```jsx

Link to my route

```

**Expected behavior:**

```html
Link to my route
```