enhance progressbar accessibility with ARIA attributes

The Progressbar component in src/components/ProgressBar.tsx currently doesn’t expose key accessibility attributes. so to make it more inclusive and compliant with accessibility standards, we can add aria-valuenow, aria-valuemax, and aria-valuemin to the progress bar element. These attributes ensure screen readers and other assistive technologies can correctly interpret its state.

expected behavior - The Progressbar should provide these ARIA attributes so assistive technologies can accurately convey its progress state to users.

This also resolves the existing TODO comment in the Progressbar source file and contributes to improving the overall accessibility of the library.

Start in src/components/ProgressBar.tsx and inspect the Progressbar element and its existing TODO comment. Add the three requested ARIA attributes using the component's progress state, then verify that assistive technologies can read the current, minimum, and maximum values.

Written by the indexing model from the issue text.